Some young star clusters contain large numbers of protostars
a. True
b. False
Indicate whether the statement is true or false
True
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What is the direction of 
in the wave as it passes P?
A. A B. B C. C D. D E. Toward the viewer. F. Away from the viewer. T. The vector is zero. G. AA H. BB I. CC J. DD
According to our present theory of solar system formation, which of the following lists the major ingredients of the solar nebula in order from the most abundant to the least abundant?
A) hydrogen and helium gas; rock; metal; hydrogen compounds B) hydrogen and helium gas; hydrogen compounds; rock; metal C) hydrogen, water, methane, helium D) hydrogen compounds; hydrogen and helium gas; metal; rock
If you exert 6 N across a distance of 2 m in 3 s you'll deliver a power of
A) 1 W. B) 3 W. C) 4 W. D) 6 W. E) more than 6 W
A tire stops a car by use of friction. What modulus should we use to calculate the stress and strain on the tire?
a. Young's modulus b. compression modulus c. shear modulus d. bulk modulus