An alien spaceship traveling at 0.630c toward the Earth launches a landing craft. The landing craft travels in the same direction with a speed of 0.830c relative to the mother ship (as measured by aliens on the mother ship). As measured on the Earth, the spaceship is 0.190 ly from the Earth when the landing craft is launched. (a) What speed do the Earth-based observers measure for the approaching landing craft? C (b) What is the distance to the Earth at the moment of the landing craft's launch as measured by the aliens (mother ship)? ly (c) What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship? yr (d*) What travel time is required for the landing craft to reach the Earth as measured by Earth-based observers? yr (e*) What travel time is required for the landing craft to reach the Earth as measured by those on the landing craft? yr

An alien spaceship traveling at 0.630c toward the Earth launches a landing craft. The landing craft travels in the same direction with a speed of 0.830c relative to the mother ship (as measured by aliens on the mother ship). As measured on the Earth, the spaceship is 0.190 ly from the Earth when the landing craft is launched. (a) What speed do the Earth-based observers measure for the approaching landing craft? C (b) What is the distance to the Earth at the moment of the landing craft's launch as measured by the aliens (mother ship)? ly (c) What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship? yr (d) What travel time is required for the landing craft to reach the Earth as measured by Earth-based observers? yr (e) What travel time is required for the landing craft to reach the Earth as measured by those on the landing craft? yr

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.

Question

An alien spaceship traveling at 0.630c toward the Earth launches a landing craft. The landing craft travels in the same direction with a
speed of 0.830c relative to the mother ship (as measured by aliens on the mother ship). As measured on the Earth, the spaceship is 0.190
ly from the Earth when the landing craft is launched.
(a) What speed do the Earth-based observers measure for the approaching landing craft?
C
(b) What is the distance to the Earth at the moment of the landing craft's launch as measured by the aliens (mother ship)?
ly
(c) What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship?
yr
(d*) What travel time is required for the landing craft to reach the Earth as measured by Earth-based observers?
yr
(e*) What travel time is required for the landing craft to reach the Earth as measured by those on the landing craft?
yr

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