The mercury column in an ordinary medical thermometer doubles in length when its temperature changes from 95? F to 105? F. Choose the correct statement:
A. the coefficient of volume expansion of mercury is 0.1 per F?
B. the coefficient of volume expansion of mercury is 0.3 per F?
C. the coefficient of volume expansion of mercury is (0.1/3) per F?
D. the vacuum above the column helps to "pull up" the mercury this large amount
E. none of the above is true
Answer: E. none of the above is true
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A physical pendulum is composed of a disc whose center of gravity is attached to a thin rod. The disc has a moment of inertia of 1?2 MR2. The mass of the disc is 500 gm and has a radius of 4.00 cm. The length of the rod is 50.0 cm. The period of the physical pendulum is
A. 1.24 sec. B. 1.42 sec. C. 1.74 sec. D. 1.90 sec. E. 2.25 sec.
A calorie is about:
A. 0.24 J B. 8.3 J C. 250 J D. 4.2 J E. 4200 J
Using a screwdriver, you try to remove a screw from a piece of furniture, but can’t get it to turn. To increase the chances of success, you should use a screwdriver that
1.is longer. 2.is shorter. 3.has a narrower handle. 4.has a wider handle.
How is Titan different from all the other Jovian satellites?
a. Titan has frozen water on its surface b. Titan has a heavily cratered surface. c. Titan has a thick atmosphere. d. Titan is the largest moon in the Solar System. e. Titan has a young, very reflective surface.