Question

A spaceship is moving past Earth at 0.99c. The spaceship fires two lasers. Laser A is in the same direction it is traveling, and Laser B is in the opposite direction. How fast will the light from each laser be traveling according to an observer on Earth? Select one: a. The light from Laser A will be traveling at 1.99c, the light from Laser B at 0.010 b. The light from Laser A will be traveling at c, the light from Laser B at 0.010 O C. The light from Laser A will be traveling at 1.99c, the light from Laser Batc O d. The light from Laser A will be traveling at c, the light from Laser B at C Strictly speaking, why isn't Earth an inertial frame? Select one: a. It is moving relative to the Sun but not orbiting the center of the Milky way galaxy O b. It is not at 'absolute rest' O c. The rotation of the Earth causes a centripetal acceleration O d. The Earth is an inertial frame because it is moving at a constant velocity around the Sun Two spaceships pass by one another. Alice in spaceship A is moving at a speed 0.7c in the +x direction, and Bob in spaceship B is moving at speed 0.7c in the -x direction. Alice compares her measurements of the time to Bob's, and Bob compares his measurements of the time to Alice's. Which of the following describes how their measurements will compare? Select one: O a. Alice will say that Bob's clocks are ticking slowly: Bob will say that Alice's clocks are ticking quickly o b. Alice will say that Bob's clocks are ticking quickly; Bob will say that Alice's clocks are ticking slowly O c. Alice will say that Bob's clocks are ticking slowly, Bob will also say that Alice's clocks are ticking slowly d. Alice will say that Bob's clocks are ticking quickly, Bob will also say that Alice's clocks are ticking quickly