A proton's rest mass is 1.67 × 10^-27 kg. Calculate its total energy when it is accelerated to a speed of 0.80 c
a. 1.5 × 10^-10 J
b. 1.0 × 10^-10 J
c. 2.5 × 10^-10 J
d. 2.0 × 10^-10 J
e. 7.5 × 10^-10 J
C
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A golf ball traveling 3 m/s to the right collides in a head-on collision with a stationary bowling ball in a friction-free environment. If the collision is almost perfectly elastic, the speed of the golf ball immediately after the collision is
A) slightly less than 3 m/s. B) much less than 3 m/s. C) slightly greater than 3 m/s. D) equal to 3 m/s.
Each of two small non-conducting spheres is charged positively, the combined charge being 40 ?C. When the two spheres are 50 cm apart, each sphere is repelled from the other by a force of magnitude 2.0 N. Determine the magnitude of the smaller of the two charges
a. 1.4 ?C b. 1.1 ?C c. 2.0 ?C d. 3.3 ?C e. 17 ?C
The energy of a photon of wavelength 400 nm is _____________.
a. 
b. 
c. 
d. 
e. 
From the Earth, the Earthlings see the Enterprise approaching from the west at 0.800c and the Klingons approaching from the east at 0.900c. What speed, in terms of the speed of light, does the crew of the Enterprise measure for the Klingon ship?
What will be an ideal response?