A current loop is placed in a magnetic field which is coming out of the board, as indicated. Will the loop tend to rotate clockwise, counterclockwise, or not at all about a vertical axis?
A. clockwise
B. counter-clockwise
C. not at all
C. not at all
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The Paleozoic era ended and the Mesozoic era began about ______________ million years ago
Fill in the blank(s) with correct word
A 20-kg piece of aluminum (which has a specific heat of 900 J/kg • °C) is warmed so that its temperature increases by 5.0°C. How much heat was transferred into it?
a. 4.5 × 10^4 J c. 1.4 × 10^5 J b. 9.0 × 10^4 J d. 2.0 × 10^5 J
The density of copper at 293 K is 
and its linear expansion coefficient is
Consider a hot cube of copper that is 1.0cm on a side when its temperature is 1356 K. What is the cube’s mass?
A. 8.80 g B. 8.46 g C. 8.78 g D. 8.38 g E. 8.94 g
Consider a situation where two moving objects collide and rebound from each other. Which of the following is not an example of potential energy?
a. The energy stored in a pile driver. b. The energy stored in a stretched spring. c. The energy of a body moving across a horizontal surface. d. The energy in the water at the top of a waterfall.