A current in a solenoid coil creates a magnetic field inside that coil. The field strength is directly proportional to:
a. Both A and B are valid choices.
c. the coil area. b. the current.
d. None of the above choices are valid.
B
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A) Andromeda Galaxy B) Cartwheel Galaxy C) Milky Way Galaxy D) Pinwheel Galaxy
Tidal locking is what makes the Moon rotate about its own axis at the same rate that it revolves around Earth
Using as a model of a moon two identical masses of mass m connected by a light rod, explain how the forces on the masses would tend to keep this satellite in a fixed orientation.
What is a heat engine?
a. A machine that heats up as it does work. b. A machine that produces heat. c. A machine that destroys heat, cooling its surroundings. d. A machine that converts heat to work. e. A machine that transfers heat to surrounding cooler objects.
As the harmonic numbers get larger, the wavelengths get smaller and the frequencies:
a. do not change. b. sometimes get larger and sometimes get smaller. c. get larger. d. stay the same. e. get smaller.