Halley's Comet is in a highly elliptical orbit around the sun. Therefore the orbital speed of Halley's Comet, while traveling around the sun,
A) is constant.
B) increases as it nears the Sun.
C) decreases as it nears the Sun.
D) is zero at two points in the orbit.
B
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A heater is rated at 1200 watts for a 120-volt source.The resistance in ohms of the heater is
a. 0.1 b. 10. c. 144,000 d. none of the above.
A long cylindrical shell (radius = 2.0 cm) has a charge uniformly distributed on its surface. If the magnitude of the electric field at a point 8.0 cm radially outward from the axis of the shell is 85 N/C, how much charge is distributed on a 2.0-m length of the charged cylindrical surface?
a. 0.38 nC b. 0.76 nC c. 0.19 nC d. 0.57 nC e. 0.98 nC
Which of the following is a scalar quantity?
A) velocity B) acceleration C) displacement D) mass E) force
For a system undergoing an adiabatic process,
a. 
b. 
c. 
d. 
e. 