Essential Cosmic Perspective
9th Edition
ISBN: 9780135795033
Author: Bennett
Publisher: PEARSON
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Chapter 4, Problem 40EAP
Group Activity: Your Ultimate Energy Source. Work as a group to answer each part. Note: You may wish to do this activity using the same four roles described in Chapter 1, Exercise 39.
a. According to the law of conservation of energy, the energy your body is using right now had to come from somewhere else. Work in groups to make a list going backwards in time describing how the energy you are using right now has pro-ceeded through time.
b. For each item on the group’s list, identify the energy as kinetic energy,gravitational potential energy, chemical potential energy, electrical potential energy, mass-energy, or
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A student of mass 40 kg dives from the 25 meter platform into the pool below.
A. Determine the Ug stored in the person-Earth system when the student is at the top of the platform.
B. Calculate how much K does the diver possess at impact. Calculate the diver’s velocity at impact.
C. Repeat steps a and b for a 80 kg diver. Explain your results (using energy in your argument).
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B. Answer the following problem scientifically. Use the GRESA method and box your final
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1) A ball has 17J of kinetic energy and its mechanical energy is 25J.
a. Find the gravitational potential energy of the ball' C?
b. If the ball has a mass of 3,2 k& what is Its height above the ground?
c. What is the speed of the ball?
I was asked to repost this in order to get help with D and E
A student of mass 40 kg dives from the 25 meter platform into the pool below.
A. Determine the Ug stored in the person-Earth system when the student is at the top of the platform.
B. Calculate how much K does the diver possess at impact. Calculate the diver’s velocity at impact.
C. Repeat steps a and b for a 80 kg diver. Explain your results (using energy in your argument).
D. If she jumped from a platform that was twice as high, how many times greater would be her velocity at impact? Explain your results (using energy).
E. How much higher would the platform have to be in order for her velocity to be twice as great?
Chapter 4 Solutions
Essential Cosmic Perspective
Ch. 4 - Prob. 1VSCCh. 4 - Check your understanding of some of the many types...Ch. 4 - Check your understanding of some of the many types...Ch. 4 - Check your understanding of some of the many types...Ch. 4 - Check your understanding of some of the many types...Ch. 4 - Define speed, velocity, and acceleration. What are...Ch. 4 - Define momentum and force. What do we mean when we...Ch. 4 - What is free-fall, and why does it make you...Ch. 4 - Prob. 4EAPCh. 4 - Prob. 5EAP
Ch. 4 - Define kinetic energy, radiative energy, and...Ch. 4 - Define and distinguish temperature and thermal...Ch. 4 - Prob. 8EAPCh. 4 - Summarize the universal law of gravitation both in...Ch. 4 - What is the difference between a bound and an...Ch. 4 - Under what conditions can we use Newton’s version...Ch. 4 - Explain why orbits cannot change spontaneously,...Ch. 4 - Explain how the Moon creates tides on Earth. Why...Ch. 4 - How do the tides vary with the phase of the Moon?...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - Decide whether the statement makes sense (or is...Ch. 4 - A car is accelerating when it is (a) traveling on...Ch. 4 - Compared to their values on Earth, on another...Ch. 4 - Which person is weightless? (a) a child in the air...Ch. 4 - Consider the statement “There’s no gravity in...Ch. 4 - To make a rocket turn left, you need to (a) fire...Ch. 4 - Compared to its angular momentum when it is...Ch. 4 - Prob. 31EAPCh. 4 - If Earth were twice as far from the Sun, the force...Ch. 4 - According to the law of universal gravitation,...Ch. 4 - If the Moon were closer to Earth, high tides would...Ch. 4 - Prob. 35EAPCh. 4 - Testing Gravity. Scientists are constantly trying...Ch. 4 - How Does the Table Know? Thinking deeply about...Ch. 4 - Perpetual Motion Machines. Every so often, someone...Ch. 4 - Group Activity: Your Ultimate Energy Source. Work...Ch. 4 - Weightlessness. Astronauts are weightless when in...Ch. 4 - Einstein’s Famous Formula. a. What is the meaning...Ch. 4 - The Gravitational Law. a. How does quadrupling the...Ch. 4 - Prob. 44EAPCh. 4 - Head to Foot Tides. You and Earth attract each...Ch. 4 - Space Elevator. Some people have proposed using a...Ch. 4 - Prob. 47EAPCh. 4 - Prob. 48EAPCh. 4 - Prob. 49EAPCh. 4 - Prob. 50EAP
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