To double the period of a pendulum, you need to multiply its length by a factor of:
A. 
B. 2
C. 
D. 
E. 4
F. Some other result (specify)
E. 4
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The dark age started as the first stars began to form
Indicate whether the statement is true or false
Young's Modulus: A wire of diameter 0.20 mm stretches by 0.20% when a 6.28-N force is applied to it. What is Young's modulus for this wire?
A. 2.5 × 1010 Pa B. 1.0 × 1011 Pa C. 2.5 × 1012 Pa D. 1.0 × 1012 Pa
Models of the Big Bang that include inflation predict that the overall geometry of the universe should be "flat" (in spacetime). This prediction
A) agrees with data found by studying the cosmic microwave background. B) has been verified by observing the paths of light coming from distant galaxies. C) has been shown to be incorrect by study of the expansion pattern of the universe. D) cannot be tested at this time.
The objective lens of a microscope
A. Focuses diverging rays from the object into a real image B. Focuses parallel rays from the object into a real image C. Focuses diverging rays from the object into a virtual image D. Focuses parallel rays from the object into a virtual image