When you leave your warm house for an hour or so on a cold day, to save energy you should turn the thermostat
A) down.
B) up.
C) off.
D) to room temperature.
Answer: C
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Gravity is an attractive force between
A. all objects everywhere B. Earth and objects on Earth C. Earth and Moon, and objects on Earth D. all massive objects
The drive chain in a bicycle is exerting a torque of 0.850 N ? m to the wheel of the bicycle. The wheel has a moment of inertia of 0.100 kg ? m2. What is the angular acceleration of the wheel?
What will be an ideal response?
A resistor is made out of a wire having a length L. When the ends of the wire are attached across the terminals of an ideal battery having a constant voltage V0 across its terminals, there is current I through the wire
If the wire were cut in half, making two wires of length L/2, and both wires were attached across the terminals of the battery (the right ends of both wires attached to one terminal, and the left ends attached to the other terminal), how much current would the battery put out? A) 4I B) 2I C) I D) I/2 E) I/4
