The period of a pendulum is 2.0 s in a stationary inertial frame of reference. What is its period when measured by an observer moving at a speed of 0.60c with respect to the inertial frame of reference?
What will be an ideal response?
2.5 s
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When sound travels faster higher above the ground than below, bending of sound tends to be
A) upward. B) downward. C) to the left. D) to the right. E) none of the above
Each of two parallel wires separated by 6.0 mm carries a 40-A current. These two currents are in the same direction. Determine the magnitude of the magnetic field at a point that is 5.0 mm from each of the wires.
A. 2.6 mT B. zero C. 1.9 mT D. 1.6 mT E. 3.2 mT
A 340-g air track cart traveling at 1.25 m/s collides elastically with a 300-g cart traveling in the opposite direction at 1.33 m/s. What is the speed of the 300-g cart after the collision?
A) 2.80 m/s B) 0.0693 m/s C) 0.899 m/s D) 1.41 m/s E) 0.475 m/s
The significant result of the Michelson-Morley experiment was that it found
a. the ether moved with the Sun. b. the ether moved with the Earth. c. the speed of the ether wind was greater than expected. d. no effect.