Galaxies that look like huge globular clusters are Hubble type
A) Irr II. B) Irr I. C) S0. D) E0. E) E7.
D
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Potential Energy: A very small 4.8-g particle carrying a charge of +9.9 ?C is fired with an initial speed of 8.0 m/s directly toward a second small 7.8-g particle carrying a charge of + 5.2 ?C. The second particle is held fixed throughout this process. If these particles are initially very far apart, what is the closest they get to each other? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
If a nonzero torque is applied to an object, that object will experience:
a. a constant angular speed. b. an angular acceleration. c. a constant moment of inertia. d. an increasing moment of inertia.
Light passes from a material with index of refraction 1.1 into one with index of refraction 1.5 after being incident at a non-normal angle (?inc ? 0). Compared to the incident ray, the refracted ray will
1.be unaffected. 2.bend towards the normal. 3.follow the normal. 4.bend away from the normal.
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