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In the “good guys vs. bad guys” example done in lecture, the good guys’ ship traveled away from the bad guys’ home planet at 0.6c after the signing of the treaty. In the frame of reference of the bad guys’ planet, where was the good guys’ ship after it had been traveling for 5 years?
ByAdmin9. Question 9 In the “good guys vs. bad guys” example done in lecture, the good guys’ ship traveled away from the bad guys’ home planet at 0.6c after the…
Consider Bob on Earth. At time t = 0, Alice flies by in her spaceship at constant velocity, heading to the right. Which diagram represents Alice’s world line in Bob’s frame of reference?
ByAdmin2. Question 2 Consider Bob on Earth. At time t = 0, Alice flies by in her spaceship at constant velocity, heading to the right. Which diagram represents Alice’s world…
Imagine that you had a spaceship that could travel at the speed of light. If you got in your spaceship and took a well-running clock (any clock that keeps time well) with you, and then passed by the Earth going at the speed of light, what would you observe about your clock?
ByAdmin9. Question 9 Imagine that you had a spaceship that could travel at the speed of light. If you got in your spaceship and took a well-running clock (any clock…
True or false: Using a matter-antimatter propulsion system and a reasonable rate of acceleration, it would not require too much fuel (less than 1000 kilograms) to travel to nearby stars in a reasonable amount of time in the rocket’s frame of reference.
ByAdmin8. Question 8 True or false: Using a matter-antimatter propulsion system and a reasonable rate of acceleration, it would not require too much fuel (less than 1000 kilograms) to travel…
Consider a spacetime diagram for Alice’s frame of reference (so Alice is positioned at x = 0) where x is in units of light years and t is in units of years. At t = 0 Alice plans to have a party. Consider the spacetime points listed below. If Bob was located at the point, and he had a spaceship that could travel at any speed up to the speed of light, would he be able to get to the party in time? (Mark all that are possible for him to get to the party in time.)
ByAdmin6. Question 6 Consider a spacetime diagram for Alice’s frame of reference (so Alice is positioned at x = 0) where x is in units of light years and t…
Alice is observing the arrivals and departures at a spaceport. She observes one flight land at pad D7, and then notes another flight take off from pad G23 seventeen seconds later. Alice knows that the distance between pad D7 and pad G23 is 1240 meters in her frame of reference. Meanwhile, Bob flies by the spaceport at a high speed V and observes the same landing and takeoff, though he records a different time and distance between the two events, based on his frame of reference. If both Alice and Bob plug in their values for the elapsed time and distance between the landing and takeoff into the formulas below (where c is the speed of light, t is the elapsed time, and x is the distance), which one will give the same answer for both?
ByAdmin11. Question 11 Alice is observing the arrivals and departures at a spaceport. She observes one flight land at pad D7, and then notes another flight take off from pad…