A person weighing 200 pounds stands on snowshoes. If the area of each snowshoe is 400 square inches, the pressure on the snow is
a. 0.25 psi
b. 0.5 psi
c. 2 psi
d. 4 psi
e. none of the above
A
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Velocity: A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)
A. 9.46 × 1012 mi B. 9.46 × 1015 mi C. 5.88 × 1012 mi D. 5.88 × 1015 mi
The area and the number of turns in a loop of wire are doubled. Assuming that all the other parameters remain the same, what happens to the induced emf in that loop of wire?
A) It is doubled. B) It is reduced by a factor of 2. C) It is reduced by a factor of 4. D) It is quadrupled. E) It stays the same.
A spar buoy is a cylindrical object that floats with its axis in the vertical direction
When it is disturbed a distance h from its equilibrium position, the magnitude of the restoring force is equal to ?ghS, where ? is the density of the water and S is the cross-sectional area of the cylinder. A certain spar buoy has a mass of 150 kg, a cross-sectional area of 2.50 m2, and is floating in seawater, ? = 1025 kg/m3. What is the frequency of ocean waves which will cause it to resonate? A) 12.9 Hz B) 2.06 Hz C) 7.19 Hz D) 17.1 Hz E) 2.72 Hz
The air pressure is 14.8 lb/in2
a. What is the approximate height, in centimeters, of a mercury column that this pressure would support? b. What would be the height, in meters, of the column for a water barometer?