Suppose the observer O ′ on the train in Figure 38.6 aims her flashlight at the far wall of the boxcar and turns it on and off, sending a pulse of light toward the far wall. Both O ′ and O measure the time interval between when the pulse leaves the flashlight and when it hits the far wall. Which observer measures the proper time interval between these two events? (a) O ′ (b) O (c) both observers (d) neither observer Figure 38.6 (a) A mirror is fixed to a moving vehicle, and a light pulse is sent out by observer O ′ at rest in the vehicle. (b) Relative to a stationary observer O standing alongside the vehicle, the mirror and O ′ move with a speed v and the light pulse follows a diagonal path. (c) The right triangle for calculating the relationship between ∆ t and ∆ t p .

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Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399
BuyFind

Physics for Scientists and Enginee...

9th Edition
Raymond A. Serway + 1 other
Publisher: Cengage Learning
ISBN: 9781305116399

Solutions

Chapter
Section
Chapter 39, Problem 39.3QQ
Textbook Problem

Suppose the observer O′ on the train in Figure 38.6 aims her flashlight at the far wall of the boxcar and turns it on and off, sending a pulse of light toward the far wall. Both O′ and O measure the time interval between when the pulse leaves the flashlight and when it hits the far wall. Which observer measures the proper time interval between these two events? (a) O(b) O (c) both observers (d) neither observer

Chapter 39, Problem 39.3QQ, Suppose the observer O on the train in Figure 38.6 aims her flashlight at the far wall of the boxcar

Figure 38.6 (a) A mirror is fixed to a moving vehicle, and a light pulse is sent out by observer O′ at rest in the vehicle. (b) Relative to a stationary observer O standing alongside the vehicle, the mirror and O′ move with a speed v and the light pulse follows a diagonal path. (c) The right triangle for calculating the relationship between ∆t and ∆tp.

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Chapter 39 Solutions

Physics for Scientists and Engineers, Technology Update (No access codes included)
Ch. 39 - A spacecraft zooms past the Earth with a constant...Ch. 39 - As a car heads down a highway traveling at a speed...Ch. 39 - A spacecraft built in the shape of a sphere moves...Ch. 39 - An astronaut is traveling in a spacecraft in outer...Ch. 39 - You measure the volume of a cube at rest to be V0....Ch. 39 - Two identical clocks are set side by side and...Ch. 39 - The following three particles all have the same...Ch. 39 - Which of the following statements are fundamental...Ch. 39 - A distant astronomical object (a quasar) is moving...Ch. 39 - In several cases, a nearby star has been found to...Ch. 39 - Explain why, when defining the length of a rod, it...Ch. 39 - A train is approaching yon at very high speed as...Ch. 39 - List three ways our day-to-day lives would change...Ch. 39 - How is acceleration indicated on a space-time...Ch. 39 - (a) Newtonian mechanics correctly describes...Ch. 39 - The speed of light in water is 230 Mm/s Suppose an...Ch. 39 - Aparticle is moving at a speed less than c/2.if...Ch. 39 - Give a physical argument that shows it is...Ch. 39 - Explain how the Doppler effect with microwaves is...Ch. 39 - It is said that Einstein, in his teenage years,...Ch. 39 - (i) An object is plated at a position p f from a...Ch. 39 - With regard to reference frames, how does general...Ch. 39 - Two identical clocks are in the same house, one...Ch. 39 - The truck in Figure P39.1 is moving at a speed of...Ch. 39 - In a laboratory frame of reference, an observer...Ch. 39 - The speed of the Earth in its orbit is 29.8 km/s....Ch. 39 - A car of mass 2 000 kg moving with a speed of 20.0...Ch. 39 - A star is 5.00 ly from the Earth. At what speed...Ch. 39 - A meterstick moving at 0.900c relative to the...Ch. 39 - Ai what speed does a clock move if it is measured...Ch. 39 - A muon formed high in the Earths atmosphere is...Ch. 39 - How fast must a meterstick be moving if its length...Ch. 39 - An astronaut is traveling in a space vehicle...Ch. 39 - A physicist drives through a stop light. When he...Ch. 39 - A fellow astronaut passes by you in a spacecraft...Ch. 39 - A deep-space vehicle moves away from the Earth...Ch. 39 - For what value of does = 1.010 0? Observe that...Ch. 39 - A supertrain with a proper length of 100 m travels...Ch. 39 - The average lifetime of a pi meson in its own...Ch. 39 - An astronomer on the Earth observes a meteoroid in...Ch. 39 - A cube of steel has a volume of 1.00 cm3 and mass...Ch. 39 - A spacecraft with a proper length of 300 m passes...Ch. 39 - A spacecraft with a proper length of Lp passes by...Ch. 39 - A light source recedes from an observer with a...Ch. 39 - Review. In 1963, astronaut Gordon Cooper orbited...Ch. 39 - Police radar detects the speed of a car (Fig....Ch. 39 - The identical twins Speedo and Goslo join a...Ch. 39 - An atomic clock moves at 1 000 km/h for 1.00 h as...Ch. 39 - Review. An alien civilization occupies a planet...Ch. 39 - A red light flashes at position xR = 3.00 m and...Ch. 39 - Shannon observes two light pulses to be emitted...Ch. 39 - A moving rod is observed to have a length of =...Ch. 39 - A rod moving with a speed v along the horizontal...Ch. 39 - Keilah, in reference frame S, measures two events...Ch. 39 - Figure P38.21 shows a jet of material (at the...Ch. 39 - An enemy spacecraft moves away from the Earth at a...Ch. 39 - A spacecraft is launched from the surface of the...Ch. 39 - A rocket moves with a velocity of 0.92c to the...Ch. 39 - Calculate the momentum of an electron moving with...Ch. 39 - An election has a momentum that is three times...Ch. 39 - Show that the speed of an object having momentum...Ch. 39 - (a) Calculate the classical momentum of a proton...Ch. 39 - The speed limit on a certain roadway is 90.0 km/h....Ch. 39 - A golf ball travels with a speed of 90.0 m/s. By...Ch. 39 - The nonrelativistic expression for the momentum of...Ch. 39 - An unstable particle at rest spontaneously breaks...Ch. 39 - Determine the energy required to accelerate an...Ch. 39 - An electron has a kinetic energy live limes...Ch. 39 - Protons in an accelerator at the Fermi National...Ch. 39 - A proton moves at 0.950c. Calculate its (a) rest...Ch. 39 - (a) Find the kinetic energy of a 78.0-kg...Ch. 39 - A proton in a high-energy accelerator moves with a...Ch. 39 - Show that for any object moving at less than...Ch. 39 - The total energy of a proton is twice its rest...Ch. 39 - Consider electrons accelerated 10 a total energy...Ch. 39 - When 1.00 g of hydrogen combines with 8.00 g of...Ch. 39 - In a nuclear power plain, the fuel rods last 3 yr...Ch. 39 - The power output of the Sun is 3.85 1026 W. By...Ch. 39 - A gamma ray (a high-energy photon) can produce an...Ch. 39 - A spaceship of mass 2.40 106 kg is to be...Ch. 39 - Show that the energymomentum relationship in...Ch. 39 - The rest energy of an electron is 0.511 MeV. The...Ch. 39 - Consider a car moving at highway speed u. Is its...Ch. 39 - A pion at rest (m = 273me) decays to a muon (m =...Ch. 39 - An unstable particle with mass m = 3.34 1027 kg...Ch. 39 - Massive stars ending their lives in supernova...Ch. 39 - Massive stars ending their lives in supernova...Ch. 39 - Review. A global positioning system (GPS)...Ch. 39 - An electron has a speed of0.750c. (a) Find the...Ch. 39 - The net nuclear fusion reaction inside the Sun can...Ch. 39 - Why is the following situation impossible? On...Ch. 39 - A Doppler weather radar station broadcasts a pulse...Ch. 39 - An object having mass 900 kg and traveling at...Ch. 39 - An astronaut wishes to visit the Andromeda galaxy,...Ch. 39 - A physics professor on the Earth gives an exam to...Ch. 39 - An interstellar space probe is launched from...Ch. 39 - The equation K=(11u2/c21)mc2 gives the kinetic...Ch. 39 - Consider the astronaut planning the trip to...Ch. 39 - An object disintegrates into two fragments. One...Ch. 39 - The cosmic rays of highest energy are protons that...Ch. 39 - Spacecraft I. containing students taking a physics...Ch. 39 - Review. Around the core of a nuclear reactor...Ch. 39 - The motion of a transparent medium influences the...Ch. 39 - Imagine that the entire Sun, of mass Ms, collapses...Ch. 39 - Why is the following situation impossible? An...Ch. 39 - An alien spaceship traveling at 0.600c toward the...Ch. 39 - (a) Prepare a graph of the relativistic kinetic...Ch. 39 - An observer in a coasting spacecraft moves toward...Ch. 39 - An observer in a coasting spacecraft moves toward...Ch. 39 - A 57Fe nucleus at rest emits a 14.0-keV photon....Ch. 39 - A particle with electric charge q moves along a...Ch. 39 - The creation and study of new and very massive...Ch. 39 - Suppose our Sun is about to explode. In an effort...Ch. 39 - Owen and Dina are at rest in frame S. which is...

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