Answer:
2.14675
Explanation:
Formula: 123° × π/180 = 2.147rad
A 82.9 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 670 (food) calories. How high must the person climb? The acceleration due to gravity is 9.8 m/s2 and 1 food calorie is 10^3 calories.
The weight watcher must climb : 3.45 km to work off the equivalent of a large piece of chocolate cake rated at 670 calories.
Determine how high the weight-watcher must climbFirst step : convert the energy to joules
670 calories to Joules
E = 670 * 10³ * 4.184
= 2803280 J
Next step : Equate energy to gravitational potential energy
2803280 J = mgh
2803280 = 82.9 * 9.8 * h
Therefore :
h = 2803280 / ( 812.42 )
= 3451 m = 3.45 Km
Hence we can conclude that The weight watcher must climb : 3.45 km
Learn more about Mountain climbing : https://brainly.com/question/787978
A skier at the bottom of a hill has 900J of kinetic energy. After sliding a ways along the flat, the kinetic energy is 300J. How much energy was lost due to friction?
Answer:
600 J
Explanation:
900 j = 300j = 600 j lost due to friction
Energy lost due to friction is 600 J.
The kinetic energy before and after friction is given as 900J and 300J.
What is friction?The force that resists the sliding or rolling over one object with another is called friction. The energy which possess in virtue of being in motion is said to be Kinetic Energy.
f = μN
Energy lost = 900J - 300J
= 600J
Learn more about friction,
https://brainly.com/question/13000653
#SPJ5
If it takes a wave on the ocean 95.2 seconds to pass by the point of a rock, what is the frequency with which the waves are passing by to the nearest two decimal places?
Answer:
.01 Hz
Explanation:
f = 1/period
= 1 / 95.2 = .01 Hz
if relative density is equal to 1 then the substance would sink in water ..true or false
relative density is equal to 1 then the substance would sink in water
What are the benefits, mechanisms and limitations of explaining, modelling and describing the material cosmos?
The study of the cosmos provides scientists with a knowledge of the material universe although limited due to lack accurate tools and equipments for the study of the cosmos.
What is the cosmos?The cosmos refers to the entire universe including the things found in them.
Understanding and explaining the universe has as always been of interest to humans both ancient and model.
Humans in ancient times earlier modelled the earth to be the centre of the universe known as the geocentric model.
A heliocentric model was proposed later to replace the geocentric model.
Both ways of modelling was limited as cosmologists did not have the tools to accurately observe outer space.
Today, advances in technology has provided powerful tool to ore accurately model the cosmos.
Therefore, the study of the cosmos provided humans with a knowledge of the material universe though limitations of accurate tools and equipments for the study of the cosmos still exist.
Learn more about cosmos at: https://brainly.com/question/805395
it the satellite is put into a new circular orbit of a smaller radius, how will the Fo and the speed of the satellite change, if at all?
A Both gravitational force and speed will decrease
OB. The gravitational force will decrease and speed will increase
O c The gravitational force will increase and speed will decrease
OD. Both gravitational force and speed will increase
OD
Explanation:
both gravitational force and speed will increase
The gravitational force will increase and speed will decrease. So, the correct option is c.
What is meant by gravitational force ?Any two objects in the universe are attracted towards each other by the gravitational force, regardless of whether their masses are equal or not.
Here,
Newton's universal law of gravitation states that the force of attraction between any two bodies is inversely proportional to the square of the distance between them and directly proportional to the product of their masses.
So, the gravitational force of the satellite,
F ∝ 1/R²
where R is the radius of the circular orbit.
The equation for speed of the satellite is given by,
v = √Rg
where g is the acceleration due to gravity.
So, the speed is directly proportional to the square root of the radius of the orbit.
v ∝ √R
Therefore, as a result of the decrease in the radius of the orbit, the gravitational force of the satellite will increase, and its speed will decrease.
Hence,
The gravitational force will increase and speed will decrease.
To learn more about gravitational force, click:
https://brainly.com/question/12528243
#SPJ2
How many grams of C are in
1.7 x 10^24 atoms of C?
1 mol = 6.022 × 10^23 atoms
1.7 x 10^24 x 1/(6.022 × 10^23) = 2.823 mol
Carbon has an atomic weight of 12.011 (grams per mol)
2.823 x 12.011 = 33.907053 g
Hope I'm right!
why do some motor vehicles contain graphite
Answer:
Some motor tyre contain Graphite to contain friction.
Answer:
to contain friction
Explanation:
Please help the due date is today.
-Don't give wrong answers
-No spam
-Correct answers will mark as brainliest
Answer:
a the structure labelled as cell wall
Explanation:
a difference between plant cells and animal cells is the most animal cells are round whether most plant cells are rectangular. plants cells have a rigid cell wall that surrounds the cell membrane.animal cell do not have cell wall when looking under a microscope, the cell wall is an easy way to distinguish between animal and plant cells
please mark as a brainliest
hope it helps you
What kinetic energy would the bicycle have if it had one-half the mass and was moving with twice the speed?
kinetic energy would beeeeeeeeeeeee 248 J
If a galaxy is 200,000 light-years away from the earth, when was the light (that we now see) emitted?
Answer:
because it goes unlimited and goes as far as the astronomy asteroid belt goes
Find the focal length of a concave mirror that produces four times larger real image of an object held at 5cm from the mirror.
Answer:
6.67 cm
Explanation:
Given
h (image) = 4 x h (object)Finding magnification
m = h (image) / h (object)m = 4 x h (object) / h (object)m = + 4.0Finding image distance
m = - (image distance / object distance)4 = - (v / 5)4 = -v/5v = -20v = -20 cmMirror formula
1/f = 1/v + 1/uSolving
1/f = 1/-20 + 1/51/f = -1 + 4/201/f = 3/20f = 20/3 cmf = 6.67 cmWhat happens to an object's kinetic energy as it falls from some height?
Answer:
The objects kinetic energy increases as it falls from some height.
A star is moving towards the earth with a speed at 90% the speed of light. It emits light, which moves away from the star at the speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star?
Answer:
The speed of light measured in any frame is c = 3.00E8 m/s.
This is one of Einstein's postulates of special relativity.
what happens to the resistance of two resistors when connected in series circuit
Answer:
increases as more components are added.
The graph represents velocity over time.
What is the acceleration?
Answer:
I think the answer is 0.2 m/s2
Explanation:
The diagram below show the earth and the sun, as well as four different possible positions for the moon (Z, W, X, and Y). Where will the moon be during a SOLAR eclipse as seen from Earth?
The diagram below shows four coastline locations on Earth with respect to the moon and sun at a given
Question 3 options:
Z
W
X
Y
Answer: Z
Explanation: I took the quiz!! :3
During a solar eclipse as seen from Earth, the moon will be at the position Z.
What is meant by solar eclipse ?When the Moon moves in front of the Sun, obstructing the Sun's view for a small portion of the Earth either completely or partially, this is known as a solar eclipse.
Here,
When the Moon is in its new moon phase, when its orbital plane is closest to that of the Earth's, and during eclipse season, such an alignment takes place roughly every six months. The Sun's disc is completely covered by the Moon during a total eclipse. The Sun is only partially covered by annular and partial eclipses. A solar eclipse can only be seen from a relatively restricted area of the earth, in contrast to a lunar eclipse, which can be seen from anyplace on the night side of Earth.
The Moon is parallel to the line connecting the Earth and the Sun at its first and final quarters. Only one-half of the Moon is visible to us as being illuminated by the Sun; the other one-half is hidden in shadow.
Hence,
During a solar eclipse as seen from Earth, the moon will be at the position Z.
To learn more about solar eclipse, click:
https://brainly.com/question/4702388
#SPJ2
Using Newton's Second Law of Motion how does the difference in mass and force affect acceleration?
400kg Force 40kg MASS C Force
Explanation:
Let & mean "is proportional to"
F & [m(V - Vo)]/∆t
We can see that increase in the applied force equals increase in the change in momentum (increase in change of velocity).
Also,
An increase in the mass of the object requires more force to be applied for work to be done.
Write down the advantage and disadvantage of using mercury as thermometric liquid..
Answer:
Advantage: Mercury has a lower freezing point (-1140 degree Celsius)
Disadvantage: Mercury has a lower boiling point
How is intelligence generally defined? Based on your reading, what do you think about the concept of intelligence and the ability to both define and measure it?
Intelligence is generally defined by the Individual IQ tests. Individual IQ tests are often administered by psychologists and take an hour to an hour and a half to complete.
What is intelligence ?The capacity for abstraction, logic, comprehension, emotional knowledge, reasoning, organization, creativity, rational reasoning, are all examples of intelligence.
Personal intellect or Intelligence quotient, given one-on-one by a psychotherapist, are the preferred process of measuring intellect.
Individual IQ tests are often administered by psychologists and take an hour to an hour and a half to complete.
Hence Intelligence is generally defined by the Individual IQ tests
To learn more about the intelligence refer to the link;
https://brainly.com/question/9944825
#SPJ1
Is this circuit parallel or inseries
Answer:
parallel circuit, hopefully I wasn't late in sending the answer
Calculate the wavelength (in m) of a 589 Hz sound in air at room temperature and pressure where the velocity of sound is 344 m/s.
Answer:
just use the formula λ = v/f
Explanation:
v = velocity
f = frequency
Why do you not want to stand still when on offense?
Question 2 options:
It makes you very easy to cover.
Your coach will take you out of the game.
Its lazy.
It makes it harder for the defense to cover you.
It makes it harder for the defense to cover you.
For an exponential function, y = A∙emx, what is the value of y when x = 0?
a.
A
b.
e
c.
x
d.
b
e.
zero
Answer:
a.A
Explanation:
when x=0, the power becomes 0 and the exponent becomes 1
anything to the power of 0 is 1
in addition, the exponent only applies to the 'e' term, hence the e term will become 1 and multiply A to give you A
A body of mass 2.00 kg is pushed straight upward by a 25.0 N vertical force. What is its acceleration
The acceleration on a body of mass 2kg with a force of 25N is 12.5 m/s^2
Mass and AccelerationGiven Data
Mass = 2 kgForce = 25NWe know that the expression for the Relationship between force acceleration and Mass is given as
F = ma----------------1
Substituting our given data into the expression we have
25 = 2*a
Making acceleration the subject of the formula we have
a = 25/2
a = 12.5 m/s^2
Learn more about acceleration here:
https://brainly.com/question/950219
If an input force of 202 N is applied to the handles of the wheelbarrow with
mechanical advantage 300, how large is the output force that just lifts the load?
Answer:
60600N
Explanation:
lnput =effort=202 N
mechanical advantage =300 and it's a ratio of load to effort but output force= load=? so substituting in the formula MA=L÷E we get the answer 60600NWhat do chemical symbols and formulas represent, respectively? elements and compounds compounds and mixtures atoms and mixtures
Answer:
They represent compounds and mixtures
Explanation:
Increasing the resistance of a variable resistor wired in series with a light bulb will not affect the voltage drop on the bulb. Group of answer choices True False
Increasing the resistance of a variable resistor wired in series with a light bulb will not affect the voltage drop on the bulb [FALSE].
Series circuitA series circuit is a type of circuit arrangement, where the same current flows in each resistor of the circuit. Also Different voltage flow in each resistor of the circuit.
The total voltage drop in a series circuit is given as;
V = IR₁ + IR₂ + IR₃ + ----
V = I(R₁ + R₂ + R₃)
From the above equation, increase in the number of resistance, increases the voltage drop.
Thus, increasing the resistance of a variable resistor wired in series with a light bulb will not affect the voltage drop on the bulb [FALSE].
Learn more about voltage drop here: https://brainly.com/question/2491461
Why is water often called the "universal solvent"? A. A large amount of energy is needed to raise its temperature. B. It remains a liquid over a wide range of temperatures. C. Many different substances can dissolve in it. D. Strong forces of cohesion allow it to form drops.
Answer:
C
Explanation:
Entropy can only be decreased in a system if ?
Answer:
heat is removed.
Explanation:
hope this helps.
Answer:
energy is removed.
Because entropy is a dynamicquality realting to the system being unavaliable to do conversions because of the energy measures being low.