EBK ESSENTIAL COSMIC PERSPECTIVE, THE
8th Edition
ISBN: 9780134532417
Author: Voit
Publisher: YUZU
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Textbook Question
Chapter 4, Problem 39EAP
Einstein’s Famous Formula.
a. What is the meaning of the formula
E = mc2? Define each variable.
b. How does this formula explain the generation of energy by the Sun?
c. How does this formula explain the destructive power of nuclear bombs?
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Astronomers use a light-year to measure distance. A light-year is the distance light travels in one year. The speed of light is approximately 300,000 km/sec.a. How long is 1 light-year in kilometers?b. The nearest star (other than the sun) is Alpha Centauri. It is 4.34 light-years from Earth. How far is that in kilometers?c. How long will it take a rocket traveling 42,000 km/hr to reach Alpha Centauri?
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1. Read and U
What information are you given?
Mass= m = 0.15 kg
Speed of light = c = 300,000,000 m/s = 3 x 108 m/s
2. Plan and Solve
What unknown are you trying to calculate?
The amount of energy produced = E = ?
What formula contains the given quantities and the unknown?
E = mc2
Replace each variable with its known variable and known value.
E = (0.15 kg)(3.00 x 108 m/s)2
E = 1.35 x 10¹6 kg.m²/s2 = 1.4 x 1016 J
3. Look Back and Check
a separate
In a nuclear reactor, 1.5 kilograms of plutonium-239 is completely
converted to energy. How many joules of energy are produced?
nits
Chapter 4 Solutions
EBK ESSENTIAL COSMIC PERSPECTIVE, THE
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 - Testing Gravity. Scientists are constantly trying...Ch. 4 - How Does the Table Know? Thinking deeply about...Ch. 4 - 37. Your Ultimate Energy Source. Roles: Scribe...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. 41EAPCh. 4 - Head to Foot Tides. You and Earth attract each...Ch. 4 - Prob. 43EAPCh. 4 - Prob. 44EAPCh. 4 - Prob. 45EAPCh. 4 - Prob. 46EAPCh. 4 - Prob. 47EAPCh. 4 - Prob. 48EAPCh. 4 - Space Station. Visit a NASA site with pictures...Ch. 4 - Prob. 50EAPCh. 4 - Prob. 51EAP
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