Suppose that a person is 15.00 y older than their sibling. The person wants to travel outward from Earth for 2.000 y and then back for another 2.000 y (both intervals as they measure them) such that the person is then 15.00 y younger than their sibling when they return. What constant speed parameter β (relative to Earth) is required? (Ignore any effects or delays from turning around).

Problem 1. Given two events, (x₁, t₁) and (x2, t2), use a spacetime diagram to find the speed of a frame of reference in which the two events occur simultaneously. What values may As² have in this case? Problem forongo fu od

Chapter 37, Problem 025 = 780 m. As detected by observer S', the two flashes Observer S detects two flashes of light. A big flash occurs at x1 = 1390 m and, 5.13 µs later, a small flash occurs at x2 occur at a single coordinate x'. (a) What is the speed parameter of S', and (b) is S' moving in the positive or negative direction of the x axis? To S', (c) which flash occurs first and (d) what is the time interval between the flashes? (a) Number Units (ь) (c) (d) Number Units

The center of our Milky Way galaxy is about 23000 ly away. (a) To eight significant figures, at what constant speed parameter would you need to travel exactly 23000 ly (measured in the Galaxy frame) in exactly 25 y (measured in your frame)? (b) Measured in your frame and in lightyears, what length of the Galaxy would pass by you during the trip?