Why will a smaller body (the Moon, for example) cool much faster than a larger body like Earth?
A. A smaller body will have a smaller iron core, which holds heat better than rock.
B. A smaller body has a larger surface area for heat to escape through, relative to its volume.
C. A smaller body will have a smaller proportion of radioactive elements.
D. A smaller body is less likely to have an atmosphere than a larger body.
Answer: B
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The first postulate of special relativity states that ____
a. observers can always detect their uniform motion relative to other objects b. observers can never detect their uniform motion except relative to other objects c. the speed of light is constant regardless of location d. the speed of light in a vacuum is constant e. energy equals mass multiplied by the speed of light, squared
You go out for a burger with some friends. At the restaurant the waiter serves you your burger on a plate. You pick up the burger with your hand and lift it to your mouth. About how much power did you expend when you lifted the burger to your mouth from the plate?
1.0.1 watts 2.1 watt 3.10 watts 4.100 watts
A spring (k = 600 N/m) is placed in a vertical position with its lower end supported by a horizontal surface. The upper end is depressed 20 cm, and a 4.0-kg block is placed on top of the depressed spring. The system is then released from rest. How far above the point of release will the block rise?
a. 46 cm b. 36 cm c. 41 cm d. 31 cm e. 20 cm
Which of the above sections of this molecule would be considered an unsaturated portion of the molecule?
A) a B) b C) c D) a and b E) all of the above