Two satellites are monitored as they orbit the Earth; satellite X is four times as far from the Earth's center as is satellite Y. From Kepler's third law one may conclude that the period of revolution of X is what factor times that of Y?
a. 1/2
c. 8.0
b. 2.0
d. 22.6
C
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Two solenoids are each made of 2 000 turns of copper wire per meter. Solenoid I is 2 m long, while solenoid II is 1 m long. When equal currents are present in the two solenoids, the ratio of the magnetic field BI along the axis of solenoid I to the magnetic field BII along the axis of solenoid II, BI/BII, is
a. 1/4. b. 1/2. c. 1. d. 2 e. 4.
Describe the interaction between Jupiter and Comet Shoemaker-Levy 9
What will be an ideal response?
A parallel-plate capacitor is charged and then is disconnected from the battery. By what factor does the stored energy change when the plate separation is then doubled?
1.It becomes four times larger. 2.It becomes two times larger. 3.It stays the same. 4.It becomes one-half as large. 5.It becomes one-fourth as large.
The angular momentum of a system remains constant
A) when the total kinetic energy is constant. B) when no net external force acts on the system. C) when the linear momentum and the energy are constant. D) when no torque acts on the system. E) all the time since it is a conserved quantity.