The force of gravity on the side of the earth facing the moon is greater than the force of gravity acting on the center of the earth.
This is because of the gravitational attraction between the earth and the moon.
The moon’s gravity pulls on the side of the earth that is closer to it, resulting in a larger gravitational force on that side than on the center of the earth. The size of the force on the side of the earth is slightly more than double that at the center, due to the inverse square law.
Thus, the force of gravity at the side of the earth facing the moon is greater than the force of gravity acting on the center of the earth.
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Complete question:
The force of gravity on the side of the earth facing the moon is the force of gravity acting on the center of the earth
greater than
smaller than
equal to
sphere has a surface uniformly charged with 1.00 c. at what distance from its center is the potential 5.00 mv?
The potential of the sphere is approximately 5.00 mV at a distance of the sphere is around 1.132 × 10⁹ m from its center.
Given that a sphere has a surface uniformly charged with 1.00 C. The distance from the center of the sphere at which the potential is 5.00 mV has to be determined. It is important to note that mV denotes millivolts, which is one-thousandth of a volt.
The potential difference between the two points is given by the expression,
V = kQ/r
Where, k = Coulomb's constant, Q = charge on the sphere, and r = distance between the center of the sphere and the point where the potential is to be measured.
We can write the expression for the distance as, r = kQ/V
Multiplying both sides by 1000 (to convert mV to V),
r = 1000 kQ/V
r = (1/4πε₀)Q/V
Where ε₀ = 8.854 × 10⁻¹² F/m is the electric constant.
Therefore, the distance of the sphere from its center if the potential is 5.00 mV is given by,
r = (1/4πε₀)Q/V
= (1/4π×8.854×10⁻¹²)×1.00/(5.00×10⁻³)
= 1.132 × 10⁹ m. (Approx.)
Therefore, the distance of the sphere from its center at which the potential is 5.00 mV is approximately 1.132 × 10⁹ m.
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the current supplied by a battery in a portable device is typically about 0.127 a. find the number of electrons passing through the device in two hours.
The number of electrons passing through the device in two hours if the current supplied by a battery is typically about 0.127 a is 5.73 × [tex]10^{21}[/tex].
Given current supplied by a battery in a portable device is typically about 0.127 A. We need to find the number of electrons passing through the device in two hours.
So the formula to find the number of electrons passing through a conductor is,
Q = I × t × n
Where Q is the total charge, I is the current, t is the time, and n is the number of electrons per charge. To calculate the number of electrons passing through a conductor, we need to determine the total charge generated by the battery.
Here,
Current (I) = 0.127 A.
Time (t) = 2 hours = 2 × 60 × 60 s = 7200 s
Now, let's find the total charge generated by the battery
Q = I × t × n
Charge on an electron = 1.6 × [tex]10^{-19}[/tex] C (As per the given question)
n = Total Charge / Charge on an electron
n = Q / (1.6 × [tex]10^{-19}[/tex])
Substituting the values
Q = 0.127 × 7200 × nQ
= 917.28n = 917.28 / (1.6 × [tex]10^{-19}[/tex])
n = 5.73 × [tex]10^{21}[/tex]
Thus, the number of electrons passing through the device in two hours is 5.73 × [tex]10^{21}[/tex].
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when a student shines a 480 nm laser through this grating, how many bright spots could be seen on a screen behind the grating?
Depending on the spacing of the grating, there can be up to four bright spots seen on the screen behind the grating.
A grating is composed of multiple lines that are etched onto a surface, and when a light passes through these lines, it is split into its component wavelengths. Since the laser is 480 nm, the diffracted light will be composed of 480 nm light.
When light is shone through a grating, it diffracts and produces a pattern of bright spots and dark fringes on a screen placed behind the grating.
Depending on the spacing of the grating, there can be up to four bright spots seen on the screen behind the grating.
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a ball of mass 0.600 kg is carefully balanced on a shelf that is 2.10 m above the ground. what is its gravitational potential energy?
The gravitational potential energy of the 0.600 kg ball balanced on a shelf 2.10 m above the ground is 12.24 J.
The gravitational potential energy of an object is calculated by the equation:
PE = mgh, where m is the mass of the object, g is the gravitational acceleration, and h is the height above the ground.
1. Calculate the gravitational potential energy using the equation PE = mgh
2. Substitute in the known values: 0.600 kg for m, 9.81 m/s2 for g, and 2.10 m for h
3. Calculate the gravitational potential energy: 12.24 J (12.24 J = 0.600 kg x 9.81 m/s2 x 2.10 m)
Therefore, the gravitational potential energy of the ball is 12.24 J (12.24 J = 0.600 kg x 9.81 m/s2 x 2.10 m).
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Which factor has the least impact on the potential energy or kinetic energy of an object?
Mass
Speed
Time
Height from the ground
Among the four options listed here, time has the least impact on the potential energy or kinetic energy of an object. Thus, option 3 is the correct answer.
Why does time have the least effect on these energies?Potential energy is the energy an object has due to its position or state, and is dependent on the height of the object from the ground and its mass. Kinetic energy is the energy an object has due to its motion, and is dependent on its mass and speed.
While time is a factor that can affect an object's potential and kinetic energy, it is not directly related to these forms of energy. Time can affect the amount of potential energy an object has by allowing it to move to a higher or lower position, but it does not directly affect the energy itself. Similarly, time can affect the kinetic energy of an object by allowing it to move for a longer or shorter period, but it does not directly affect the energy itself.
Therefore, time has the least impact on the potential energy or kinetic energy of an object compared to mass, speed, and height from the ground.
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a 60 kg dancer applies a horizontal force of -800 n on the dance floor. the dancer's acceleration will be
The acceleration of the dancer who applies a horizontal force of -800 N on the dance floor will be 13.33 m/s².
The formula used to calculate acceleration is as follows:F = m × a
where,F is the force,m is the mass, and,a is the acceleration
Substituting the given values in the above formula, we get:
-800 N = 60 kg × a
We can solve this equation for a, which will give us the acceleration of the dancer.
a = (-800 N) / (60 kg) = -13.33 m/s²
Therefore, the acceleration of the dancer will be 13.33 m/s².
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additional required problem: two people, one of mass 85 kg and the other of mass 55 kg, sit in a rowboat of mass 78 kg. with the boat initially at rest, the two people, who have been sitting at opposite ends of the boat, 3.0 m apart from each other, now exchange seats. how far and in what direction will the boat move?
The boat will not move since the two people exchanging seats will not cause a net linear momentum on the boat.
The equation for linear momentum is P = mv, where m is the mass and v is the velocity of an object.
Since the boat is initially at rest, its linear momentum is P = 0.
Let's start by calculating the linear momentum before the exchange:
P = (85kg)(0) + (55kg)(0) = 0
After the people exchange seats, the linear momentum of the boat is no longer 0.
Now let's calculate the linear momentum after the exchange:
P = (85kg)(v) + (55kg)(-v) = (140kg)v
Since the total linear momentum is conserved, we can equate the two linear momentums and solve for v:
0 = (140kg)v
v = 0
The equation for linear momentum is P = mv, where m is the mass and v is the velocity of an object.
Therefore, the boat will not move since the velocity of the boat is 0.
This makes sense since the two people exchanging seats will not cause a net linear momentum on the boat.
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the reason distance has a greater effect on the force of gravity between our earth and moon is because the distance between them is
The reason distance has a greater effect on the force of gravity between our Earth and Moon is because the distance between them is relatively large.
The reason distance has a greater effect on the force of gravity between the Earth and the Moon is because the force of gravity between two objects decreases with the square of the distance between them. This is known as the inverse square law of gravity.
The force of gravity between two objects is proportional to the product of their masses, and inversely proportional to the square of the distance between them. Mathematically, it can be expressed as,
F = G * (m1 * m2) / r^2
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between them.
In the case of the Earth and the Moon, their masses are fixed, so the only variable that affects the force of gravity between them is the distance. As the distance between the Earth and the Moon increases, the force of gravity between them decreases rapidly, according to the inverse square law.
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--The complete question is, Fill in the blank, the reason distance has a greater effect on the force of gravity between our earth and moon is because the distance between them is ________________.--
mercury's average density is about 1.5 times greater than that of earth's moon, even though the two bodies have similar radii. what does this suggest about mercury's composition?
Mercury's average density is about 1.5 times greater than that of Earth's moon, even though the two bodies have similar radii. This suggests that Mercury's composition is denser than that of Earth's moon.
The density of a substance is defined as the ratio of its mass to its volume. Mercury's average density is about 5.427 grams per cubic centimeter (g/cm³), whereas the average density of Earth's moon is about 3.34 g/cm³. Despite the fact that Mercury and Earth's moon have similar radii, Mercury's density is approximately 1.5 times greater than that of Earth's moon, indicating that Mercury's composition is denser than that of Earth's moon.
Mercury, unlike the Moon, has a large iron core, which contributes to its high density. The high density of Mercury's core, which is thought to account for about 60% of the planet's mass, is caused by the fact that it is composed primarily of iron and nickel.
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a free electron and free proton are released from rest in the same electric field.what is true for the electrical forces experienced by these two particle?
Answer:
Both particles are subjected to the same electrical force,
The acceleration of the electron will be much greater than that of the proton: F = m a and Mproton / Melectron = 1840
The electron and proton will be accelerated in opposite directions.
how would the escape velocity of earth change if the earth suddenly became more dense and became 25 times more massive (but kept its size)?
The escape velocity of Earth would increase significantly (25 times) if it became 25 times more massive but kept its size. This is because escape velocity is determined by the ratio of mass to radius - increasing the mass of the Earth would cause a proportionate increase in escape velocity.
To calculate the escape velocity of a planet, the equation v = sqrt[2GM/r] can be used, where G is the gravitational constant (6.67x10-11 m3 kg-1 s-2), M is the mass of the planet (25 times greater in this example) and r is the radius of the planet (unchanged in this example).
Escape velocity is calculated based on the mass and radius of an object. As the mass of an object increases, the escape velocity increases. This means that if the Earth's mass increases by 25 times, its escape velocity will increase as well.
To calculate the escape velocity, we use the formula: Escape Velocity = sqrt(2GM/r), where G is the gravitational constant (6.67408 x 10^-11 m^3 kg^-1 s^-2), M is the mass of the object, and r is the radius of the object. In this case, if the Earth's mass increases by 25 times, the escape velocity will increase by 25 times as well. This means that the new escape velocity of the Earth would be 25 times the original value.
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A string is stretched to a length of 238 cm and both ends are fixed. If the density of the string is 0.014 g/cm, and its tension is 1610 N, what is the fundamental frequency? Answer in units of Hz.
Answer:
The fundamental frequency of a vibrating string is given by:
f = (1/2L) √(T/μ)
where L is the length of the string, T is the tension in the string, and μ is the linear density (mass per unit length) of the string.
In this problem, L = 238 cm, T = 1610 N, and μ = 0.014 g/cm = 0.00014 kg/cm. We can convert the units of length and mass to SI units (m and kg) to get the frequency in Hz:
L = 2.38 m
μ = 0.00014 kg/m
Substituting these values into the formula, we get:
f = (1/2L) √(T/μ)
f = (1/2 × 2.38 m) √(1610 N / 0.00014 kg/m)
f = 106.8 Hz
Therefore, the fundamental frequency of the string is 106.8 Hz.
Answer:
The fundamental frequency of the string is 225.29 Hz.
Explanation:
To calculate the fundamental frequency of the string, we use the formula below.
Formula:
F' = (1/2l)√(T/m)............... Equation 1
Where:
F' = Fundamental frequency of the string
l = length of the string
T = Tension on the string
m = mass per unit length of the string
From the question,
Given:
l = 238 cm = 2.38 m
T = 1610 N
m = 0.014 g/cm = 0.0014 kg/m
Substitute these values into equation 1
F' = 1/(2×2.38)[√(1610/0.0014)]
F' = (0.210){√(1150000)
F' = (0.210×1072.38)
F' = 225.29 Hz.
Hence, the fundamental frequency of the string is 225.29 Hz.
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why does it take more energy to convert liquid water to steam than it does to convert ice to liquid water
It takes more energy to convert liquid water to steam than it does to convert ice to liquid water because of: the change in temperature
When converting liquid water to steam, the temperature of the water needs to increase from its liquid state to the boiling point, which is 100°C (212°F).
On the other hand, when converting ice to liquid water, the temperature only needs to increase from its solid state to 0°C (32°F). This requires more energy because the greater the temperature difference, the more energy is needed.
The reason why more energy is required to convert liquid water to steam is because of the latent heat of vaporization. The latent heat of vaporization is the amount of energy that needs to be added to a liquid to convert it to a gas.
For water, this energy is 2257 kJ/kg. In other words, 2257 kJ of energy is needed to convert 1 kg of liquid water to 1 kg of steam. This is why it takes more energy to convert liquid water to steam than it does to convert ice to liquid water.
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the wavelength of an electromagnetic wave is measured to be 600 m.(a)what is the frequency of the wave?(b)what type of em wave is it?
The frequency of the electromagnetic wave is calculated using the formula f = c/λ, where c is the speed of light in a vacuum (3 × 10⁸ m/s) is 5 × 10⁵ Hz.
What is the frequency and type of wave?Plugging in the wavelength of 600 m, we get the frequency of the wave as 5 × 10¹⁴ Hz.
The type of electromagnetic wave is determined by its frequency. Based on the frequency calculated above, this is a radio wave.
Frequency of the electromagnetic wave is determined as f = c/λ, where c is the speed of light, λ is the wavelength of the wave. Substitute c = 3 × 10⁸ m/s and λ = 600 m into the formula.
f = c/λ = (3 × 10⁸ m/s)/(600 m) = 5 × 10⁵ Hz
The wavelength of the electromagnetic wave is 600 meters, which falls under the radio waves category.
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a block of mass 5.0 kg is acted upon by a single force, producing an acceleration of 2.0 m/s2. the force has a value of
The force that is acted upon a block of mass 5.0 kg producing an acceleration of 2.0 m/s2 is 10 N.
What is Newton's Second Law of Motion?
The Second Law of Motion, often referred to as the law of force and acceleration, states that the force applied to an object is directly proportional to its mass and acceleration.
Newton's Second Law of Motion states that the force exerted on an object is directly proportional to its mass and acceleration.
The law states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.
In mathematical terms:
F = m*a
Where: F is the force acting on the object, m is the mass of the object, a is the acceleration produced by the force.
Following this formula, the force that is acted upon a block of mass 5.0 kg producing an acceleration of 2.0 m/s2 is given as:
F = m * a
F = 5.0 kg * 2.0 m/s2F = 10 N
Therefore, the force that is acted upon a block of mass 5.0 kg producing an acceleration of 2.0 m/s2 is 10 N.
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hich device involves the use of plasma in technology?arc welderdiesel enginea car radiobattery-operated flashlight
The device that involves the use of plasma in technology is an arc welder. Plasma is used in a variety of technological applications. The correct option is A.
Which device involves the use of plasma in technology?Arc welder involves the use of plasma in technology.
What is an arc welder?An arc welder is a welding tool that employs electricity to create an electrical discharge between an electrode and a base metal to generate heat. The heat generated by the arc is capable of melting and fusing metal parts.
The electrode is a metal wire that melts as the current passes through it, producing an arc that fuses the metal parts together.
Arc welding is widely used in the metalworking and construction industries due to its ability to create permanent and robust connections between metal parts.
The most common type of arc welding is stick welding, which employs a flux-covered electrode and an arc welder power source to generate an electrical arc that fuses metal parts together.
Other types of arc welding include TIG (Tungsten Inert Gas) welding and MIG (Metal Inert Gas) welding, which employ different types of electrodes and gas shields to generate an electrical arc that fuses metal parts together.
Plasma cutting is another technique that employs plasma in technology. Plasma cutting involves the use of a plasma torch to cut metal parts. The torch generates a plasma jet that melts and cuts the metal parts, leaving a clean and smooth cut.
Plasma cutting is widely used in the metalworking and construction industries due to its ability to cut metal parts quickly and accurately. Therefore, the correct option is arc welder.
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why can the electric force be attractive or repulsive, where the gravitational force is always attractive?
The electric force can be attractive or repulsive, whereas the gravitational force is always attractive due to the fact that the electric force depends on the type of electric charge, while the gravitational force is only influenced by the mass of the objects involved.
The electric force is dependent on the type of electric charge of the two objects involved. When two objects are oppositely charged, the electric force between them is attractive, while when they are both charged, the electric force is repulsive.
On the other hand, the gravitational force is only influenced by the mass of the two objects involved, which always leads to attraction. This is why the electric force can be both attractive and repulsive, while the gravitational force is always attractive.
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engineers at the university of texas at austin are developing an advanced locomotive propulsion system that uses a gas turbine and perhaps the largest highspeed flywheel in the world in terms of the energy it can store. the flywheel can store 4.8 * 108 j of energy when operating at its maximum rotational speed of 15,000 rpm. at that rate, the perimeter of the rotor moves at approximately 1,000 m/s. determine the radius of the flywheel and its rotational inertia.
The radius of the flywheel and its rotational inertia will be 0.64m and 389kgm² respectively.
What is the rotational inertia?Rotational inertia, also known as moment of inertia, is a measure of an object's resistance to rotational motion. It is similar to the concept of mass in linear motion. Just as mass is a measure of an object's resistance to linear motion, the moment of inertia is a measure of an object's resistance to rotational motion.
The moment of inertia of an object depends on its shape and mass distribution. Objects with more mass distributed farther from the axis of rotation have a higher moment of inertia than objects with the same mass but a more compact distribution of mass. The moment of inertia is measured in units of kilograms square meters (kg m²) in the SI system.
The radius will be:
= 1000 / 15000(2πrad / 60)
= 0.64m
The inertia will be:
= 2(4.8 × 10^8) / 100 (2π/60)
= 389kgm²
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an object is located in water 30 cm from the vertex of a convex surface made of plexiglas with a radius of curvature of 80 cm. where does the image form by refraction and what is its magnification? nwater
The image formed by refraction is at a distance of 120cm behind the lens and its magnification is 4.
The image formation by refraction and magnification of an object in water 30 cm from the vertex of a convex surface made of plexiglass with a radius of curvature of 80 cm can be calculated using the following steps:
1. Determine the object's distance from the lens. Object distance (u) = -30 cm. (negative sign as per the convention of the mirror)
2. Determine the focal length of the lens using the formula:
f = R/2 where, f = focal length of the lens, R = radius of curvature of the lens.
So, f = 80/2 = 40 cm.
3. Use the mirror formula to determine the image distance from the surface:
1/f = 1/v + 1/u where,v = image distance from the surface.
Substituting the given values (with proper sign convention), we get:
(-1/40) = 1/v + (-1/30)
Solving for v, we get:
v = 120 cm.
5. Use the magnification formula to determine the magnification of the image:
m = -(v/u)
where,m = magnification, v = 120 cm, u = 30 cm
Therefore,m = -(120/-30) = 4
Therefore, the image will form at a distance of 120 cm from the lens on the water side of the lens and is magnified by a factor of 4.
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the mass of the planet mars is only about 11% of the earth's mass. but the average density of mars is over 70% of the density of earth. the explanation for this is that
The explanation for this planet is that Mars has a smaller volume than Earth, despite having a mass that is only about 11% of Earth's mass which is option B. This means that the matter that makes up Mars is more tightly packed than the matter that makes up Earth, resulting in a higher average density for Mars.
Planet explained.The reason for Mars having a smaller volume is related to its formation and evolution. Scientists believe that Mars formed from the same material as the rest of the solar system, including Earth, but it never grew large enough to become a fully-fledged planet like Earth. Instead, it remained a relatively small rocky body, and as it cooled and solidified, its interior contracted, causing the planet's volume to shrink. This contraction also caused the planet's crust to wrinkle and crack, resulting in the formation of the planet's distinctive surface features, such as valleys, canyons, and mountains.
In addition to its smaller size, Mars also has a lower average atomic weight than Earth, which means that its rocks and minerals contain fewer heavy elements, such as iron and nickel. This also contributes to Mars having a lower overall mass than Earth, despite having a higher average density.
Overall, the combination of Mars' smaller size and lower atomic weight results in a planet that is less massive than Earth but has a higher average density.
The question is incomplete, the completed part which are the options was gotten from another website.
Mars has less gravity, which enhances its density. Mars has only 15% the volume of Earth Mars feels a weaker pull from the Sun The Earth has more waterLearn more about planet below.
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a 6 kg block is pushed 8m up a rough 37 degree inclined plane by a horizontal force of 75 n. the initial speed of the block is 2.2 m/s up the plane and a constant kinetic friction force of 25 n opposes the motion. calculate:
The final kinetic energy of the block is 308.98 J.
Let's solve the problem using the work-energy theorem.
Mass of the block, m = 6 kgDistance covered, s = 8 mForce, F = 75 NInitial speed of the block, u = 2.2 m/sAngle of inclination, θ = 37°Coefficient of kinetic friction, μk = 0.28The work-energy theorem states that the work done on an object is equal to the change in its kinetic energy
W = ΔKE
Initially, the block is at rest. Therefore, its initial kinetic energy is zero.
Ki = 0
We have to find the final kinetic energy of the block. Hence, Kf = ?
Work done on the block
W = Fscosθ
Work done by the applied force,
F = 75 Ns = 8 mθ = 37°
W = Fscosθ
W = 75 × 8 × cos 37°
W = 451.27 J
Work done by the frictional force
Ff = μkFn
The normal force
Fn = mg
Fn = 6 × 9.8
Fn = 58.8 N
Here,
Ff = μkFn
Ff = 0.28 × 58.8
Ff = 16.51 J
Work of friction:
W = Ff × s
W = 16.51 × 8
W = 132.1 J
The total work done on the block,
Wtotal = W + Wfriction
Wtotal = 451.27 + 132.1
Wtotal = 583.37 J
According to the work-energy theorem,
Wtotal = ΔKE
ΔKE = Wtotal
ΔKE = 583.37 J
Final kinetic energy of the block
Kf = KEFinal
Kf = ΔKE
Kf = 583.37 J
Kf = 308.98 J
Therefore, the final kinetic energy of the block is 308.98 J.
Complete question:
A 6 kg block is pushed 8m up a rough 37 degree inclined plane by a horizontal force of 75 N. The initial speed of the block is 2.2 m/s up the plane and a constant kinetic friction force of 25 N opposes the motion. Calculate the fianl kinetic energy of the block.
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joshua sees two different colored stars in the night sky. based on his observations, what can joshua infer about the two stars?
Based on Joshua's observation that he sees two different colored stars in the night sky, he can infer that the two stars have different temperatures.
When Joshua sees two different colored stars in the night sky, he can infer that the two stars have different temperatures. This is because the colors of stars depend on their temperatures. When a star is blue, it means that it's hotter than a star that is yellow or red.
As a result, Joshua can infer that the two stars have different temperatures due to their colors.A star's temperature is determined by its color. The color of a star is determined by its surface temperature.
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a force applied to an object of mass m1 produces an acceleration of 3.60 m/s2 . the same force applied to a second object of mass m2 produces an acceleration of 1.60 m/s2 . what is the value of the ratio m1/m2?
The value of the ratio m1/m2 would be 4.5.
Newton's lawWe can use Newton's Second Law of Motion to solve this problem, which states that force (F) is equal to mass (m) times acceleration (a):
F = ma
Let F be the force applied to both objects. Then we have:
F/m1 = 3.60 m/s^2
F/m2 = 1.60 m/s^2
Dividing the second equation by the first equation, we get:
(F/m2)/(F/m1) = (1.60 m/s^2)/(3.60 m/s^2)
Simplifying the left side, we get:
m1/m2 = (F/m1)/(F/m2) = (m2/m1)*(1.60 m/s^2)/(3.60 m/s^2)
m1/m2 = (m2/m1)*(2/9)
We can rearrange this equation to get:
m1/m2 = (9/2)*(m2/m1)
Therefore, the value of the ratio m1/m2 is 9/2, or approximately 4.5.
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the terminal velocity of an object depends primarily upon the terminal velocity of an object depends primarily upon its shape. its composition. its size. the temperature.
The terminal velocity of an object depends primarily upon its size. Air resistance is proportional to the cross-sectional area of the object, which increases as the square of the object's size.
Terminal velocity is the maximum velocity that an object can reach when it falls through a fluid, such as air or water. As an object falls, it experiences two main forces: gravity, which pulls it down, and air resistance, which acts in the opposite direction and slows it down. The amount of air resistance that an object experience depends on several factors, including its size, shape, and composition. However, for most objects, size is the primary determinant of air resistance. This is because air resistance is proportional to the cross-sectional area of the object, which increases as the square of the object's size.
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a 75-kilogram bicyclist coasts down a hill at a constant speed of 12 meters per second. what is the kinetic energy of the bicyclist?
The bicycle rider's kinetic energy A cyclist has a kinetic energy of 2084.44 J.
What is the kinetic energy of a cyclist?Up to 90% of a woman's energy or movement can be converted into kinetic energy when riding a bicycle. The bike is then propelled by using this energy. While riding along a path, the bike is kept stable by the rider's momentum and balance.
How is kinetic energy calculated?The relationship between kinetic energy and an object's mass and square of the its velocity is direct: K.E. = ½ m v2. The kinetic energy is measured in kgs divided by the square per second squared if the mass is measured in kilogrammes and the velocity is measured in metres per second.
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a galvanometer can be converted to an ammeter by the addition of a select one: a. large resistance in series. b. small resistance in parallel. c. small resistance in series. d. large resistance in parallel.
A galvanometer can be converted to an ammeter by the addition of a c. small resistance in series.
A galvanometer is a device used to measure current, and by adding a small resistance in series, the current can be limited, allowing for more accurate measurements. To put it simply, a galvanometer consists of a coil of wire, which has a needle attached to it. When a current is passed through the wire, the needle will deflect, showing the direction and magnitude of the current. By adding a small resistance in series, the current can be limited, and the resulting current can be measured with an ammeter. This process allows for more accurate measurements and can be used in many different scenarios, such as in circuit design.
To summarize, a galvanometer can be converted to an ammeter by adding a small resistance in series. This allows for more accurate measurements of current and can be used in many different scenarios.
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what would the rotation period of the earth have to be for persons and objects at the equator to experience apparent weightlessness?
In order for people and objects at the equator to experience apparent weightlessness, the rotation period of the earth would have to be 84 minutes.
The centrifugal force caused by the rotation of the earth would have to be equal to the force of gravity in order for this to occur. This is because the centrifugal force would counteract the force of gravity and create the illusion of weightlessness.
To calculate the required rotation period, we can use the following formula:
rotation period = 2π√(r/g)where r is the radius of the earth and g is the acceleration due to gravity.
At the equator, the radius of the earth is approximately 6,378 km and the acceleration due to gravity is approximately 9.81 m/s^2.
Rotation period = 2π√(6,378,000/9.81)
rotation period ≈ 5066 seconds
rotation period ≈ 84 minutes
Therefore, the rotation period of the earth would have to be approximately 84 minutes for people and objects at the equator to experience apparent weightlessness.
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a wire 0.50 m long carrying a current of 8.0 a is at right angles to a uniform magnetic field. the force on the wire is 0.40 n. what is the strength of the magnetic field?
0.10 T. Given, Length of the wire (l) = 0.50m current (I) = 8.0 A Force (F) = 0.40 N We need to find the strength of the magnetic field.
Using the formula, F = B*l*I*sin(θ)Here, θ = 90° (at right angles)⇒ sin(θ) = sin(90°) = 1Therefore, F = B*l*I*1B = F/(l*I)Substituting the given values, we get B = 0.40 N/(0.50 m * 8.0 A)B = 0.10 T Therefore, the strength of the magnetic field is 0.10 T. An HTML format answer: Given, Length of the wire (l) = 0.50 m Current (I) = 8.0 A Force (F) = 0.40 N We need to find the strength of the magnetic field.
Using the formula, F = B*l*I*sin(θ)Here, θ = 90° (at right angles)⇒ sin(θ) = sin(90°) = 1Therefore, F = B*l*I*1B = F/(l*I)Substituting the given values, we get B = 0.40 N/(0.50 m * 8.0 A)B = 0.10 T Therefore, the strength of the magnetic field is 0.10 T.
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a boat moves at 10.8 m/s relative to the water. if the boat is in a river where the current is 2.00 m/s, how long does it take the boat to make a complete round trip of 1 100 m upstream followed by a 1 100-m trip downstream?
Time taken for the boat to make a complete round trip of 1 100 m upstream followed by a 1 100-m trip downstream is 200 seconds.
The boat moves at 10.8 m/s relative to the water, and the current is 2.00 m/s. To make a complete round trip of 1 100 m upstream followed by a 1 100-m trip downstream, it would take:
When the boat is moving upstream, it is going against the direction of the current.
Upstream: 1 100 m/ (10.8 m/s - 2.00 m/s) = 102.78 s
When the boat is moving downstream, it is going in the same direction as the current,
Downstream: 1 100 m/ (10.8 m/s + 2.00 m/s) = 97.22 s
Total time taken in going upstream and downstream is the sum of the time calculated in both cases
102.78 s + 97.22 s = 200 s
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the pebble is 3.81 m from the center of the tornado and has a tangential speed equal to that of the surrounding wind: 124 m/s. what is the magnitude of the centripetal acceleration of the pebble? answers
The magnitude of the centripetal acceleration of the pebble is 4035.6 m/s²
The magnitude can be calculated using the equation:
a = v²/r
where a is the centripetal acceleration, v is the tangential speed, and r is the radius.
To explain this further, centripetal acceleration is the component of the acceleration that is perpendicular to the direction of motion, directed toward the center of the circular path. The equation a = v²/r states that the centripetal acceleration is equal to the tangential speed squared divided by the radius of the circular path.
For the given example, the radius is 3.81 m and the tangential speed is 124 m/s, so the centripetal acceleration of the pebble is equal to:
a = (124)² / 3.81 = 4035.6 m/s².
Therefore, the magnitude of the centripetal acceleration of the pebble, 3.81 m from the center of the tornado, and having a tangential speed equal to that of the surrounding wind, 124 m/s is 4035.6 m/s².
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