Which of the following is an example of chemical energy?
A) the energy stored in firewood that has been gathered for burning
B) the energy stored in your body, that enables you to do work
C) Both of the above.
D) the energy in a stretched rubber band
E) the energy in hot steam
C
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What will be an ideal response?
Components: If a vector 
has components Ax > 0, and Ay < 0, then the angle that this vector makes with the positive x-axis must be in the range
A. 0° to 90°. B. 90° to 180°. C. 180° to 270°. D. 270° to 360°. E. It cannot be determined without additional information.
Two forces act on a 55-kg object. One force has magnitude 65 N directed 59° clockwise from the positive x-axis, and the other has a magnitude 35 N at 32° clockwise from the positive y-axis. What is the magnitude of this object's acceleration?
A) 1.1 m/s2 B) 1.3 m/s2 C) 1.5 m/s2 D) 1.7 m/s2
An uncharged, series RC circuit is connected across a battery. For which situation will the time for the capacitor to reach 90% of its final charge remain unchanged? a. The RC time constant is doubled
b. The battery voltage is doubled. c. A second resistor is added in series with the original resistor. d. All of these situations result in the time for the capacitor to reach 90% of its final charge to change.