Indicate the validity of the following decay processes. For any reactions which are not valid (that is, not permitted), give a reason. (a) ?0 —> ?0 + ?0 (b) ?? —> ?? + ?? (c) ?0 —> ?0 + ?0 + ?+
not valid because ?S = 1, valid, not valid because ?Q = 1
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Life began on land
a. True b. False Indicate whether the statement is true or false
You hold a 2 newton apple, having a mass of 0.2 kg, at rest in your hand. The net force on the apple is then
A) 2 newtons upward. B) 0.2 kg downward. C) 2 newtons downward. D) 0.2 kg upward. E) zero.
A proton and a deuteron are moving with equal velocities perpendicular to a uniform magnetic field. A deuteron has the same charge as the proton but has twice its mass. The ratio of the acceleration of the deuteron to that of the proton is:
a. 1. b. 2. c. 0.5. d. There is no acceleration in this case.
Consider a situation where you carry a 20 N box up a flight of stairs, raising its elevation by 5 m. You drop the box. As it falls to its original level, its kinetic energy is __________
Fill in the blank(s) with correct word