A rod is 2.40 m long and has a diameter of 2.50 mm. A force of 2000 N is applied to the end to stretch the rod by 1.00 mm. What is the tensile modulus for this rod?
a. 
b. 
c. 
d. 
e. 
c.
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In pushing an object on a level surface, work is done against ______________
Fill in the blank(s) with correct word
Beats: A music tuner uses a 554-Hz C# tuning fork to tune the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of the instrument?
A. It must be 556 Hz. B. It must be 552 Hz. C. It could be either 556 Hz or 552 Hz. D. It could be either 553 Hz or 555 Hz. E. It is neither 556 Hz or 552 Hz.
If a 20 W laser beam, which has an initial diameter of 2.0 mm, spreads out to a diameter of 2.0 m after traveling 10,000 m, what is the initial Erms of the beam?
a. 
b. 
c. 
d. 
e. 
A pendulum on the Earth has a period T. The acceleration of due to gravity on Mars is less than that on the Earth, and the acceleration due to gravity on the Moon is even less. Where would the period of an identical pendulum be the least?
a. on the Earth b. on the Moon c. on Mars d. The period of a pendulum would be the same on the Earth, Moon, and Mars since the period depends on the pendulum's length which is the same for identical pendula.