For a body oscillating at the end of a spring, the energy is
a. kinetic energy.
b. elastic potential energy.
c. gravitational potential energy.
d. all of the above.
e. none of the above.
d
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Radioactive Decay: What happens to the half-life of a radioactive substance as we increase its temperature?
A. It does not change. B. It increases. C. It decreases at a constant rate. D. It decreases at an exponential rate.
An object that is moving with an acceleration different from zero will always have a(n) ______________ velocity
a. changing b. increasing c. constant d. decreasing
The cosmological redshift is actually not a velocity at all, but a measure of the expansion of space-time
Indicate whether the statement is true or false
One reactant of photosynthesis is
a. hydrogen. b. oxygen. c. carbon dioxide. d. methane.