A right triangle has sides 10 m, 5 m, and 11 m. The smallest angle of this triangle is nearest
a. 32°.
b. 27°.
c. 22°.
d. 63°.
e. Not attainable since this is not a right triangle.
b
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How does the prevailing model for activity explain the hot ejected gas seen in active galaxies?
A. It is energy released as matter is funneled into a black hole. B. It is gas evaporating from an accretion disk around a massive black hole. C. It is shot out of a black hole. D. It is material trapped between two orbiting black holes being gravitationally scattered. E. It is a rip in space-time from which Hawking radiation is released.
The electric field in a region of space is given by Ex = (3.0x) N/C, Ey = Ez = 0, where x is in m. Points A and B are on the x axis at xA = 3.0 m and xB = 5.0 m. Determine the potential difference VB ? VA
a. ?24 V b. +24 V c. ?18 V d. +30 V e. ?6.0 V
Compared to a recoiling rifle, the bullet that is fired has a greater
A) momentum. B) kinetic energy. C) none of the above
What is meant by a wave medium?
a. a wave of moderate amplitude b. water c. air d. any material through which a wave travels