You hold an apple in one hand and an orange in the other. If you doubled the mass of the apple and tripled the mass of the orange, without changing the distance between them, the gravitational force between them would be
A) unchanged, because it is zero both before and after the mass alterations.
B) five times larger.
C) doubled.
D) three times larger.
E) six times larger.
E
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The explosion in a cannon exerts an average force of 30,000 N for 2.00 meters. The velocity of a 2.00 kg projectile shot from the cannon is
A. 198 m/s. B. 245 m/s. C. 302 m/s. D. 354 m/s. E. 412 m/s.
Initially, a blue automobile has twice the kinetic energy that a red automobile has. Both are braked to a stop; both have the same amount of braking force. The red auto will stop in ________ as the blue auto.
A. half the distance B. four times the distance C. the same distance D. twice the distance E. one fourth the distance
Electromagnetic waves can be produced by
A) electric charges moving with constant velocity. B) electric charges at rest. C) electric charges in accelerated motion. D) All of the previous answers are correct. E) None of the previous answers is correct.
The Q value for a particular reaction is -2.4 MeV, and the reaction's threshold energy is 9.60 MeV. What is the ratio of the mass of the incident particle to the mass of the stationary target nucleus?
A) -0.75 B) 0.25 C) 3 D) 4 E) 5