The relativistic effect of time dilation has been verified by which of the following?

a. the discovery of black holes
b. muon experiments
c. twin experiments
d. red shift in distant galaxies


b

Physics & Space Science

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A locomotive is pulling 19 freight cars, each of which is loaded with the same amount of weight

The mass of each freight car (with its load) is 37,000 kg. If the train is accelerating at 0.22 m/s2 on a level track, what is the tension in the coupling between the second and third cars? (The car nearest the locomotive is counted as the first car, and friction is negligible.)

Physics & Space Science

A 2-kg mass is hung from a spring (k = 18 N/m), displaced slightly from its equilibrium position, and released. What is the frequency of its vibration?

A) 1.5/? Hz B) 1.5 ? Hz C) 3.0/? Hz D) 3.0 Hz E) 1.5 Hz

Physics & Space Science

When we apply the Lorentz factor ? to momentum, we

A) multiply by ? as with the equation for time dilation. B) multiply by the reciprocal of ?. C) find it does not apply.

Physics & Space Science

You go out for a burger with some friends. At the restaurant the waiter serves you your burger on a plate. You pick up the burger with your hand and lift it to your mouth. This action requires about ________ of work

1.0.1 joules 2.1 joule 3.10 joules 4.100 joules

Physics & Space Science