1According to the Michelson and Morley experiments, which of the following is NOT true?   The laws of physics are the same in all frames of reference that are moving uniformly.   Waves had to have some medium to travel through.   The speed of light is constant and is independent of the motion of the source or the observer.   A beam of light that travels parallel to the aether would take longer than the beam that travels perpendicularly to the aether.

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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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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1According to the Michelson and Morley experiments, which of the following is NOT true?
 
The laws of physics are the same in all frames of reference that are moving uniformly.
 
Waves had to have some medium to travel through.
 
The speed of light is constant and is independent of the motion of the source or the observer.
 
A beam of light that travels parallel to the aether would take longer than the beam that travels perpendicularly to the aether.
 
2The half-life of Calcium-47 is 3.91 x 105 seconds. A sample contains 4.11 x 1016 nuclei. How much of the sample is left after 7.82 x 105 seconds?
 
5.14 x 1015 nuclei
 
2.57 x 1015 nuclei
 
2.06 x 1016 nuclei
 
1.03 x 1016 nuclei
 
3After two half-lives, how much of the original sample would remain?
 
50%
 
6.25%
 
12.5%
 
25%
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