At sea level, at a latitude where 
, a pendulum that takes 2.00 s for a complete swing back and forth has a length of 0.993 m. What is the value of g in m/s2 at a location where the length of such a pendulum is 0.970 m?
A. 0.098 3
B. 3.05
C. 9.57
D. 10.0
E. 38.3
Answer: C
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If we say that a galaxy has a lookback time of 1 billion years, we mean that
A) its light traveled through space for 1 billion years to reach us. B) it is now 1 billion light-years away. C) it was 1 billion light-years away when the light left the galaxy. D) it is 400 million years old.
How many revolutions per second are needed for a centrifuge to produce an acceleration of 1 200g at a radius arm of 15.0 cm?
a. 0.0280 rev/s b. 44.6 rev/s c. 14.2 rev/s d. 6.68 rev/s
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.
The sum total of all the wave energy in the oceans could supply all the world's energy needs
What will be an ideal response?