Problem 12.13Sophie Zabar, clairvoyante, cried out in pain at precisely the instant her twin brother, 500 km away, hit his thumb with a hammer. A skeptical scientist observed both events (brother's accident, Sophie's cry) from an airplane traveling at 12 с c to the right (Fig. 12.19). Which event occurred first, according to the scientist? How much earlier was it, in seconds? 13

An astronaut travels to the next star at 0.95c and back. He notices that hishike took him 11 years. When he returns, what will be the period of timethat will have passed on Earth during his absence?

Question 24. Suppose a cosmic ray colliding with a nucleus in the Earth’s upper atmosphere produces a muon that has a velocity ?=0.950?. The muon then travels at constant velocity and lives 1.52?s as measured in the muon’s frame of reference. (You can imagine this as the muon’s internal clock.) a. How far does it travel as viewed by an observer moving with it? Base your calculation on its velocity relative to the Earth and the time it lives (proper time). b. What distance does the muon travel according to an Earth-bound observer? *for first part 0.433 km can you help with the second part?

An event occurs in a reference system at x = 500 m and t = 0.90 μs. AnotherThe reference system is moving at a speed of 0.9c on the positive x axis according to this reference system. Originscoincides at time t = 0 and the clock in the second reference system at the moment the origins coincideis reset. In what coordinates and time did this event occur according to the second reference system?

Newly sprouted sunflowers can grow at the rate of 0.30 in. per day. One such sunflower is left on Earth, and an identical one is placed on a spacecraft that is traveling away from Earth with a speed of 0.97 c. Part A How tall is the sunflower on the spacecraft when a person on Earth says his is 1.7 in. high? Express your answer using two significant figures. VE ΑΣΦ h = Submit = Previous Answers Request Answer ? X Incorrect; Try Again; 2 attempts remaining in. Review

A particle has a mass of 1.88E-28 kg and it travels at a speed of 0.942c, where c is the speed of light. What is the energy of the particle, expressed in MeV. Keep three significant digits

1. A rocket flies toward the earth at c, and the captain shines a laser light beam in the forward direction. Which of the follow- ing statements about the speed of this light are correct? (There may be more than one correct answer.) A. The captain measures speed c for the light. B. An observer on earth measures speed e for the light. C. An observer on earth measures speed c for the light. D. The captain measures speed c for the light.

Spaceships A and B move in opposite directions at the same speed of 0.378c relative to earth, with A moving away from earth and B moving toward earth. Find the velocity of B relative to A. с

If someone travels at v = 0.99c, she can become younger than her children (assuming the kids stay home on Earth). In one or two sentences, explain how this is possible.

David is 30 years old, and his sister Alexis is 25 years old, when David leaves to travel to planet Rosebud. Planet Rosebud is 20 lightyears away, and at rest relative to the Earth, and David travels at 0.85c. When David begins his journey, he is 5 years older than Alexis. When David arrives at planet Rosebud, who is older (David or Alexis) and by how much?