A solar eclipse that occurs when the Moon's umbra reaches Earth's surface is called
a. a total solar eclipse.
b. a partial solar eclipse.
c. an annular solar eclipse.
d. a penumbral solar eclipse.
e. an umbral solar eclipse.
a
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A current can be made to flow in a wire if
a. it is connected to a battery. b. it is put into motion near a magnet. c. a magnet is put into motion near it. d. all of the above.
Like most pulsars, the Crab Nebula neutron star is known only by its radio pulses
Indicate whether the statement is true or false
Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. Neglect air resistance. As time progresses, the difference in their speeds
A) increases. B) remains constant. C) decreases. D) cannot be determined from the information given.
If we increased the pressure in a gas, how will its spectral lines be affected?
What will be an ideal response?