A fancy sports car passes Big Ben at a speed of 0.600 c. What time interval will the driver measure for a one-second interval on the large clock?
a. 1.67 s
b. 0.800 s
c. 1.25 s
d. 0.600 s
e. 1.00 s
C
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Consider a conducting bar that is free to slide along conducting rails in an upward magnetic field as shown in the diagram below. We push the bar so that it moves to the right at a constant speed. Which way will current flow through the bar, the rails, and the light bulb?
A. Clockwise
B. Counter-clockwise
C. No current flows at all.
Photons behave like
A) waves. B) particles. C) both waves and particles. D) neither waves nor particles.
He discovered that the orbits of planets are ellipses which was not what was conventionally thought to be true that they orbited in perfect circles
a) Copernicus b)Tycho Brache c)Kepler d)Ptolemy
A solid sphere of mass 2.5 kg and radius 0.12 m is at rest at the top of a ramp inclined 15°. It rolls to the bottom without slipping. The upper end of the ramp is 1.2 m higher than the lower end. Find the sphere's total kinetic energy when it reaches the bottom
a. 70 J c. 29 J b. 47 J d. 8.8 J