College Physics for AP Courses
1st Edition
ISBN: 9781630181871
Author: OpenStax, Ima Lyubkinskaya, Gregg Wolfe Douglas, Ingram, Liza Puiji, Sudhi Oberoi Nathan, Czuba
Publisher: OpenStax College.
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Textbook Question
Chapter 28, Problem 17PE
(a) How fast would an athlete need to be running for a 100-m race to look 100 yd long? (b) Is the answer consistent with the fact that relativistic effects are difficult to observe in ordinary circumstances? Explain.
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Passage Problems
Laptop computers are equipped with accelerometers that sense when
the device is dropped and then put the hard drive into a protective mode.
Your computer geek friend has written a program that reads the accel-
erometer and calculates the laptop's apparent weight. You're amusing
yourself with this program on a long plane flight. Your laptop weighs
just 5 pounds, and for a long time that's what the program reports. But
then the "Fasten Seatbelt" light comes on as the plane encounters turbu-
lence. Figure 4.27 shows the readings for the laptop's apparent weight
over a 12-second interval that includes the start of the turbulence.
76. At the first sign of turbulence,
the plane's acceleration
a. is upward.
b. is downward.
c. is impossible to tell from
the graph.
77. The plane's vertical ac-
celeration has its greatest
magnitude
a. during interval B.
b. during interval C.
c. during interval D.
78. During interval C, you can
conclude for certain that the
plane is
Apparent…
If the metal sphere on the Van de Graff has a charge of 0.14 Coulombs and the person has a mass of 62 kg, how much excess charge would the person need in order to levitate at a distance 25 cm from the center of the charged metal sphere? Assume you can treat both the person and the metal sphere as point charges a distance 25 cm from each other
If the metal sphere on the Van de Graff has a charge of 0.14 Coulombs and the person has a mass of 62 kg, how much excess charge would the person need in order to levitate at a distance 25 cm from the center of the charged metal sphere? Assume you can treat both the person and the metal sphere as point charges a distance 25 cm from each other (so that you can use Coulomb's Law to calculate the electrical force).
Chapter 28 Solutions
College Physics for AP Courses
Ch. 28 - Which of Einstein's postulates of special...Ch. 28 - Is Earth an inertial frame of reference? Is the...Ch. 28 - When you are flying in a commercial jet, it may...Ch. 28 - Does motion affect the rate of a clock as measured...Ch. 28 - To whom does the elapsed time for a process seem...Ch. 28 - How could you travel far into the future without...Ch. 28 - To does an object seem greater in length, an...Ch. 28 - Relativistic effects such as time dilation and...Ch. 28 - Suppose an astronaut is moving relative to the...Ch. 28 - Explain the meaning of the terms "red shift" and...
Ch. 28 - What happens to the relativistic Doppler effect...Ch. 28 - Is the relativistic Doppler effect consistent with...Ch. 28 - All galaxies farther away than about 50106ly...Ch. 28 - How does modern relativity modify the law of...Ch. 28 - Is it possible for an external force to be acting...Ch. 28 - How are the classical laws of conservation of...Ch. 28 - What happens to the mass of water in a pot when it...Ch. 28 - Consider a thought experiment. You place an...Ch. 28 - The mass of the fuel in a nuclear reactor...Ch. 28 - We know that the velocity of an object with mass...Ch. 28 - Given the fact that light travels at c, can it...Ch. 28 - If you use an Earth-based telescope to project a...Ch. 28 - (a) What is if v=0.250c ? (b) If v=0.500c ?Ch. 28 - (a) What is if v=0.100c ? (b) If v=0.900c ?Ch. 28 - Particles called -mesons are produced by...Ch. 28 - Suppose a particle called a kaon is created by...Ch. 28 - A neutral -meson is a particle that can be...Ch. 28 - A neutron lives 900 s when at rest relative to an...Ch. 28 - If relativistic effects are to be less than 1%,...Ch. 28 - If relativistic effects are to be less than 3%,...Ch. 28 - (a) At what relative velocity is =1.50 ? (b) At...Ch. 28 - (a) At what relative velocity is =2.00 ? (b) At...Ch. 28 - Unreasonable Results (a) Find the value of for...Ch. 28 - A spaceship, 200 m long as seen on board, moves by...Ch. 28 - How fast would a 6.0 m-long sports car have to be...Ch. 28 - (a) How far does the muon in Example 28.1 travel...Ch. 28 - (a) How long would the muon in Example 28.1 have...Ch. 28 - (a) How long does it take the astronaut in Example...Ch. 28 - (a) How fast would an athlete need to be running...Ch. 28 - Unreasonable Results (a) Find the value of for...Ch. 28 - Unreasonable Results A spaceship is heading...Ch. 28 - Suppose a spaceship heading straight towards the...Ch. 28 - Repeat the previous problem with the ship heading...Ch. 28 - If a spaceship is approaching the Earth at 0.100c...Ch. 28 - (a) Suppose the speed of light were only 3000 m/s....Ch. 28 - If a galaxy moving away from the Earth has a speed...Ch. 28 - A space probe speeding towards the nearest star...Ch. 28 - If two spaceships are heading directly towards...Ch. 28 - Two planets are on a collision course, heading...Ch. 28 - When a missile is shot from one spaceship towards...Ch. 28 - What is the relative velocity of two spaceships if...Ch. 28 - Near the center of our galaxy, hydrogen gas is...Ch. 28 - A highway patrol officer uses a device that...Ch. 28 - Prove that for any relative velocity v between two...Ch. 28 - Show that for any relative velocity v between two...Ch. 28 - (a) All but the closest galaxies are receding from...Ch. 28 - Find the momentum of a helium nucleus having a...Ch. 28 - What is the momentum of an electron traveling at...Ch. 28 - (a) Find the momentum of a 1.00109 kg asteroid...Ch. 28 - (a) What is the momentum of a 2000 kg satellite...Ch. 28 - What is the velocity of an electron that has a...Ch. 28 - Find the velocity of a proton that has a momentum...Ch. 28 - (a) Calculate the speed of a 1.00- g particle of...Ch. 28 - (a) Calculate for a proton that has a momentum of...Ch. 28 - What is the rest energy of an electron, given its...Ch. 28 - Find the rest energy in joules and MeV of a...Ch. 28 - If the rest energies of a proton and a neutron...Ch. 28 - The Big Bang that began the universe is estimated...Ch. 28 - A supernova explosion of a 2.001031 kg star...Ch. 28 - (a) Using data from Table 7.1, calculate the mass...Ch. 28 - (a) Using data from Table 7.1, calculate the...Ch. 28 - There is approximately 1034 J of energy available...Ch. 28 - A muon has a rest mass energy of 105.7 MeV, and it...Ch. 28 - A -meson is a particle that decays into a muon...Ch. 28 - (a) Calculate the relativistic kinetic energy of a...Ch. 28 - Alpha decay is nuclear decay in which a helium...Ch. 28 - (a) Beta decay is nuclear decay in which an...Ch. 28 - A positron is an antimatter version of the...Ch. 28 - What is the kinetic energy in MeV of a -meson...Ch. 28 - Find the kinetic energy in MeV of a neutron with a...Ch. 28 - (a) Show that (pc)2/(m c 2)2=21. This means that...Ch. 28 - One cosmic ray neutron has a velocity of 0.250c...Ch. 28 - What is for a proton having a mass energy of...Ch. 28 - (a) What is the effective accelerating potential...Ch. 28 - (a) Using data from Table 7.1, find the mass...Ch. 28 - (a) Calculate the energy released by the...Ch. 28 - A Van de Graaff accelerator utilizes a 50.0 MV...Ch. 28 - Suppose you use an average of 500kWh of electric...Ch. 28 - (a) A nuclear power plant converts energy from...Ch. 28 - Nuclear-powered rockets were researched for some...Ch. 28 - The Sun produces energy at a rate of 4.001026 W by...Ch. 28 - Unreasonable Results A proton has a mass of...Ch. 28 - Construct Your Own Problem Consider a highly...Ch. 28 - Construct Your Own Problem Consider an astronaut...
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