You drop a freely falling body at the equator and at the north pole. The acceleration of the freely falling body at the equator is _______________ the acceleration of the freely falling body at the north pole
Fill in the blank(s) with correct word
the same as
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Magnetic Field of a Long Wire: The magnetic field due to the current in a long, straight wire is 8.0 ?T at a distance of 4.0 cm from the center of the wire. What is the current in the wire? (?0 = 4? × 10-7 T ? m/A)
A. 0.20 A B. 0.40 A C. 0.80 A D. 3.2 A E. 1.6 A
Why are plate tectonics not as important a factor on the Moon as they are on Earth?
What will be an ideal response?
An ideal gas at pressure, volume, and temperature, P0, V0, and T0, respectively, is heated to point A, allowed to expand to point B also at A’s temperature 2T0, and then returned to the original condition. The internal energy decreases by 3P0V0/2 going from point B to point
T0. In going around this cycle once, which quantity equals zero?
a.
the net change in internal energy of the gas
b.
the net work done by the gas
c.
the net heat added to the gas
d.
All three are zero.
Resistance and Resistivity: Consider two copper wires of equal length. One wire has twice the cross-sectional area of the other. How do the resistances of these two wires compare?
A. The thicker wire has twice the resistance of the thinner wire. B. The thicker wire has eight times the resistance of the thinner wire. C. The thicker wire has one-half the resistance of the thinner wire. D. The thicker wire has four times the resistance of the thinner wire. E. The thicker wire has one-fourth the resistance of the thinner wire.