[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
The Correct choice is A
Before 16th century, people thought that sun revolves around earth. but soon after that time period Astronomers realized that actually planets orbited around the sun.
Answer:
The Correct choice is A
Before 16th century, people thought that sun revolves around earth. but soon after that time period Astronomers realized that actually planets orbited around the sun.
How is the rpm (revolutions per minute) of an actual four-stroke gasoline engine related to the number of thermodynamic cycles
Answer:
The gasoline engine would have:
intake stroke
compression stroke
power stroke
exhaust stroke
This is a total of 2 revolutions and 4 thermodynamic cycles
So the number of thermodynamic cycles is twice the rpm of the engine
(100 points in return)
A baseball is flying through the
air at 40 m/s east. This
measurement represents the
ball's
A. speed
B. velocity
C inertia
D. force
Answer:
[tex] \huge\boxed {\sf Velocity}[/tex]
Explanation:
The unit of measurement is m/s hence it can not inertia or force because the unit of intertia and force are kg m² & kg⋅m/s² respectively, hence Option C and Option D can not be the right answer.
To understand the final answer one must know the difference between velocity and speed.
Velocity is a vector quantity which is direction specific. It's the displacement per unit time, the displacement is an vector quantity.
[tex] \sf \: Velocity = \frac{Displacement }{Time} [/tex]
Velocity can be positive negative or zero!
Speed is a scalar quantity which tells the distance covered in unit time. since it's a scalar it have magnitude only, not direction.
[tex] \sf \: Speed = \frac{Distance }{Time} [/tex]
Speed is always either zero or positive.
In the question it tells the baseball is flying through the air at 40 m/s east,
if it was only 40m/s with no direction then it would be speed. but the east is indicating the direction and velocity includes the direction hence the given measurement represents Velocity.
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As a general rule, what will create greater drag on an object?
Answer:
the faster you move the greater, the drag force acting against the object.
Explanation:
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What is the force exerted on a charge of 2.5 µc moving perpendicular through a magnetic field of 3.0 × 102 t with a velocity of 5.0 × 103 m/s?
3.75 N of force will be applied to a charge. Because of the electric field, a force operated on the charge.
What is the definition of electricity?The electric force between two charges is proportional to their product and inversely proportional to the square of their distance.
In this question, the provided data is:
F is the applied force,
q denotes the charge, which is equal to 2.5 C.
v is the velocity = 5.0 10³ m/s
B is the magnetic field = 3.0 10² T
The following is the force on a moving charge:
[tex]\rm F = q V B sin \alpha \\\\ F = 2.5 \times 10^{-6} \times 3 \times 10^{-2} \times 5 \times 10^3 \\\\ F=3.75 \ N[/tex]
As a result, 3.75 N will be exerted on a charge.
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Answer:
3.8 N
Explanation:
got it right on edge
Voltage ___ commonly occur when large loads, such as motors, are turned off and voltage on the power line increases above the normal voltage fluctuation (+10%) for a short period of time.
Answer:
Voltage SPIKES
Explanation:
what is the kinetic energy of a ball with a mass of 7 kg rolling at 10m/s
Answer:
350 j
Explanation:
K.E. = 1/2 m v^2
= 1/2 7 * 10 ^2 = 350 j
If a typical house requires 235 W of electric power on average, how much deuterium fuel would have to be used in a year to supply these electrical needs
For a typical house requires 235 W of electric power on average, deuterium fuel used is mathematically given as
E=79206.75
How much deuterium fuel would have to be used in a year to supply these electrical needs?Generally, the mass and time statement of deuterium is mathematically given as
Mass deuterium=2.014g
time =3.15*107s= 1year
In conclusion, energy
E=235*3.15*107s
E=79206.75
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The hertzsprung-russell diagram, for classifying stars based on the relationship between their brightness, temperature and color, is provided below. which type of star would our sun be? question 3 options: white dwarf red giant supergiants main sequence
The Sun is a main-sequence star which is also known as G2V.
How sun is formed?It can also known as yellow dwarf because of its yellow colour. It was formed about 4.6 billion years ago from the gravitational collapse of matter of a large molecular cloud.
So we can conclude that the Sun is a main-sequence star which is also known as G2V.
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Order the objects by typical relative size. Smallest first to largest last.
Universe, star, galaxy, moon, planet
Please answer asap!
Answer:
moon planet star galaxy universe
Which element is the main component of
steel and the most widely used of all metals
Answer:
iron
Explanation:
If a supernova remnant core has a mass greater than 2.8 solar masses, then what force will be able to stop gravity from collapsing the core
If a supernova remnant core has a mass greater than 2.8 solar masses, then NO force will be able to stop gravity from collapsing the core. (Option C)
What is a Supernova Remnant Core?A supernova Remnant Core is an astronomic structure that is remaining after the explosion of a star in a supernova has occurred.
A supernova is simply the explosion of a star. When the mass of the sun is used as a unit of mass, it is called solar mass. This unit is given as:
1.989 × 1030 kg.
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Earth has a definite orbit within the solar system. This orbit is mainly a result of the.
Earth has a definite orbit within the solar system whose the orbit is mainly a result of the mass of the Sun.
What is an orbit?An orbit is defined as the regular, repeating path that one object in space takes around another while an object in an orbit is called a satellite which may be natural, such as the Earth or the Moon. According to the height of satellites from the earth, these orbit are classified as
High Earth orbitMedium Earth orbitLow Earth orbit.Most of the weather and some communications satellites will tend to have a high Earth orbit which is farthest away from the surface. The main difference between orbit and orbitals is that the former is defined as a fixed path of electron revolutions, whereas the latter is defined as an uncertain region with a high probability of finding an electron.
Therefore, the Earth has a definite orbit within the solar system whose the orbit is mainly a result of the mass of the Sun.
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The electronic circuitry in an ultrasonic receiver measures the transit time and calculates the distance from the receiver to the surface of material.
a. True
b. False
Answer: False
Explanation:
The fact that large elliptical galaxies are much more common in the central regions of galaxy clusters than elsewhere in the universe suggests that __________.
The fact that large elliptical galaxies are more common in central galaxy clusters suggests that collisions play a role in the formation of these galaxies.
What is galaxy formation?Galaxy formation is a physical phenomenon where molecular clouds of dust concentrate and thus first generate stars.
Galaxy formation is a process that can be associated with collisions, at least for the formation of elliptical galaxies.
Collisions are a relatively frequent process in clusters (groups) of galaxies that are formed by crashes with other galaxies.
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PLEASE HELP: Do you think there could be another period of time when so many brilliant discoveries are made in such a span of time? Why or Why not? Make sure to research other times to be able to defend your point.
Answer:
"Emerging technologies, such as industrial robots, artificial intelligence, and machine learning, are advancing at a rapid pace. These developments can improve the speed, quality, and cost of goods and services, but they also displace large numbers of workers."
Explanation:
This means in the furture we will have many technologies doing our day to day life things.
downhill water movement is responsible for
At the end stages of their lives, most stars will become: (A) Planetary nebulae (B) White dwarfs (C) Neutron stars (D) Black holes (E) Brown dwarfs (F) Both A and B
A star will become a white dwarf when its nuclear fuel is finished because of no more emission of heat and light.
What happen when a star comes to its end stage?When the end of the nuclear burning stage of a star comes, such a star expels most of its outer material creating a planetary nebula until only the hot core remains. When this core settles down, it will become a young white dwarf.
So we can conclude that a star will become a white dwarf when its nuclear fuel is finished because of no more emission of heat and light.
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is the SI unit of heat energy.
Answer:
Joule (J)
Explanation:
Joule (J) is the SI unit of heat energy (any energy - thermal, electrical, mechanical..). It is named after the English physicist James Prescott Joule.
What would be the weight of a 59.1-kg astronaut on a planet twice as massive as Earth and having twice Earth's radius
Answer:
29.55 kg
Explanation:
force gravity = G m1 m2 / (r^2) now change the mass 1 and the r
= G 2m1 m2 / ( 2r)^2
= 2/4 G m1 m2 / (r^2)
the weight will be 2/4 or 1/2 the original
you look up and see a helicopter pass directly overhead. 3.10s later you hear the sound of the engine. if the air temperature is 23.0 degrees c, how high was the helicopter flying?
Answer:
Time,
t
=
3.1
s
Temperature,
T
=
23.0
∘
Speed of the sound at
23.0
∘
can be given as,
{eq...
Study the scenario. A turbine spins as wind blows across it, generating electricity. The System consists of the wind, turbine, air, generator, and electrical wires. Which image and description best analyzes the flow of energy?
A.) The total energy of the system remains constant due to the law of conservation of energy.
B.) the total energy of the system increases because energy is gained during transformations.
C.) The total energy of the system remains constant due to the law of conservation of energy.
D.) The total energy of the system increases because energy is gained during transformations.
Answer:
The total energy of the system remains constant due to the law of conservation of energy.
The diagram is the one that starts with "wind energy" and breaks up into "heat energy in the turbines and air" and "kinetic energy in moving the turbine"
Explanation:
I just took the test and this was the correct answer.
The potential difference across a conducior is 6.0V. What is the energy dissipaled when a current of 5.0 A flows for 1 minute?
Answer:
1/2 watt hr
Explanation:
watts = V I = 6 * 5 = 30 watts for 1/60 hr
30 watts * 1/60 hr = 1/2 watt hr
Examine table b then read the statement and choose the best responses. as the resistance increased under 25 v, the current . compared to calculated currents, experimental currents proved to be . currents varied proportionally according to resistance: 10 ω of resistance produced a current of a, while 100 ω of resistance produced a current of a.
The best responses to the statements are:
a. the current decreased.
b. The Same.
c. 2.5.
d. 0.25.
What is resistance?In an electrical circuit, resistance is a measure of the resistance to current flow.
The Greek letter omega is used to represent resistance in ohms.
The resistance is inversely proportional to the current.
Thus, the correct options are a. the current decreased.
b. The Same.
c. 2.5.
d. 0.25.
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Answer:
Ye ye answer be below:
Explanation:
~Hope this helps! :)
a car is 500m behind a truck. if the speed of the car is 80km/h and speed of the truck is 60km/h how long will it take for the car to reach the truck
Based on the information in the table, choose whether the magnetic field is weak or strong
Current Number of Coils Magnetic Field Strength 0. 2 A Many _______________
5. 0 A Many _______________
5. 0 A Few _______________
put weak or strong in the blanks
Answer:
Explanation:
Field characteristics
The strength of the field at the Earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia.
help me friends thank you
Explanation:
Sound travels faster In solids than liquid than gases
Speed of sound is highest in solids, and higher in liquids and slower in gases. Example- Sound travels in air with the speed of 330 m/s, In steel it travels with a speed of 5920 m/s, In liquids it travels with a speed of 5000 m/s.
Hope this helps you
How fast does an X-ray travel through space?
Answer:
As with other forms of electromagnetic radiation, X-rays can be described as coupled waves of electric and magnetic fields traveling at the speed of light (about 300,000 km, or 186,000 miles, per second).
Explanation:
hope it's help
What is best to say about a runner who is running at a constant velocity? a. their acceleration is positive. b. their acceleration is negative. c. their acceleration is zero. d. their acceleration cannot be determined. please select the best answer from the choices provided. a b c d
Answer:
C
Explanation:
because acceleration is the rate of change of velocity.
Answer:
C
Explanation:
bcuz i said its c cuzzo
A particle's position (in meters) is given by the equation s(t) = 5x sin(2x), on the interval [-1, 4] minutes. What is its instantaneous velocity at t = 0?
You almost certainly meant to say the particle's position is a function of time t, not some other variable x (or vice versa) so that
s(t) = 5t sin(2t)
Differentiate s(t) to get the instantaneous velocity of the particle at time t. By the product rule,
s'(t) = 5 sin(2t) + 10t cos(2t)
Evaluate the derivative at t = 0 :
s'(0) = 0
The instantaneous velocity at t = 0 is 0 m/s.
To find the instantaneous velocity at t = 0, we need to take the derivative of the position function s(t) with respect to time (t). The derivative of s(t) gives us the velocity function v(t), which represents the particle's velocity at any given time t.
Given the position function s(t) = 5t * sin(2t), we find the velocity function v(t) by taking the derivative:
v(t) = d/dt (5t * sin(2t)).
To find the velocity at t = 0, we substitute t = 0 into the velocity function:
v(0) = 5 * 0 * sin(2 * 0) = 0.
Therefore, the instantaneous velocity of the particle at t = 0 is 0 m/s. This means that at t = 0, the particle is momentarily at rest, and its velocity is neither increasing nor decreasing at that specific moment.
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A solenoid 1.85 m long and 2.20 cm in diameter carries a current of 21.0 A. The magnetic field inside the solenoid is 25.0 mT. Find the length of the wire forming the solenoid.
Answer:
A wire carrying a 30.0-A current passes between the poles of a strong magnet that is perpendicular to its field and experiences a 2.16-N force on the 4.00 cm of wire in the field. What is the average field strength?
Explanation:
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