The speed of FM waves will be observed to be c = 2.9979 × 10^8 m/s when the antenna emitting the waves is
a. at rest relative to the receiving antenna.
b. moving to the right of the detecting antenna at 0.5c.
c. moving to the left of the detecting antenna at 0.5c.
d. moving as described in (a), (b) or (c) above.
e. moving at 2.9979 × 10^8 m/s.
d
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A 6-kg object is moving to the right at 4 m/s and collides with a 4-kg object moving to the left at 6 m/s. The objects collide and stick together. After the collision, the combined object:
a. has the same kinetic energy that the system had before the collision. b. has more kinetic energy than the system had before the collision. c. has no kinetic energy. d. has less momentum than the system had before the collision.
The photosphere is the coolest layer close to the Sun, for the radiation of visible light allows it to cool off efficiently
Indicate whether the statement is true or false
The colors dispersed by a prism are due to different light
A) speeds inside the prism. B) directions inside the prism. C) energies inside the prism. D) none of the above
An object of radius R and moment of inertia I rolls down an incline of height H after starting from rest. Its total kinetic energy at the bottom of the incline:
a. is gR/I. b. is I/gH. c. is 0.5 Ig/H. d. cannot be found from the given information alone.