An ideal spring with a spring constant (force constant) of 22N/m is stretched from equilibrium to 2.9 m. How much work is done in the process?
A) 186 J B) 47 J C) 121 J D) 93 J
D
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In a ferromagnetic material, regions of parallel unpaired electron spin are magnetic _________.
Fill in the blank(s) with the appropriate word(s).
System A transfers 100 calories to System B by heat. As a result of this process, which of the following is the result?
1.System A contains 100 calories less heat. 2.System B contains 100 calories more heat. 3.Both of these are true. 4.None of these are true.
An alternative to the core-accretion theory that explains the formation of the jovian planets is the
A) differentiation theory. B) collision theory. C) gravitational instability theory. D) Big Bang theory. E) nebular contraction theory.
A wheel rotates about a fixed axis with an initial angular velocity of 20 rad/s. During a 5.0-s interval the angular velocity decreases to 10 rad/s. Assume that the angular acceleration is constant during the 5.0-s interval. How many radians does the wheel turn through during the 5.0-s interval?
A. 95 rad B. 85 rad C. 65 rad D. 75 rad E. 125 rad