Which of the following energy forms is stored in any compressed or stretched object?

a. nonmechanical energy
b. elastic potential energy
c. gravitational potential energy
d. kinetic energy


Ans: b. elastic potential energy

Physics & Space Science

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Suppose that a comet goes around the sun in an elliptical orbit such that the comet at the farthest point in its orbit is 3 times as far from the sun as it is when it is at its closest point. How many times stronger is the gravitational force on the comet due to the sun when it is at its closest point than when it is at its farthest?

A. is the same at both positions.
B. times stronger
C. 3 times stronger
D. 9 times stronger
E. 27 times stronger
F. The answer depends on the relative masses of the comet and the sun.

Physics & Space Science

Suppose we carefully synchronize two identical atomic clocks initially standing next to each other (call them A and B). We put clock B on a jet plane, which then flies around the world at an essentially constant speed of 300 m/s, returning 134,000 s (37.1 h) later. We then again compare the two clocks. Assume the earth’s surface defines an inertial reference frame, and ignore the possible effects of gravity. Which clock measures the space time interval between the synchronization and comparison events?

A. Clock A B. Clock B C. Both D. Neither

Physics & Space Science

The heliocentric model was actually first proposed by

A) Aristotle. B) Archimedes. C) Aristarchus. D) Alexander the Great. E) Hipparchus.

Physics & Space Science

If M = 6.0 kg, what is the tension in string 1?

A. 39 N B. 34 N C. 29 N D. 44 N E. 51 N

Physics & Space Science