The unit of electric resistance, the ohm, is equivalent to which of the following?
a. V/A
b. V?m
c. A/s
d. A/m
a
Physics & Space Science
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What evidence do we have that the chromosphere is hotter than the photosphere?
What will be an ideal response?
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At target practice, a rifle bullet is fired at an angle of 30° below the horizontal with an initial velocity of 800 m/s from the top of a cliff 80 m high
How far from the base of the cliff does it strike the level ground below if air resistance is negligible?
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Around us in the galactic plane, we find stars of a variety of ages and compositions
Indicate whether the statement is true or false
Physics & Space Science
The greatest astronomer of antiquity [that is, of the time before the Middle Ages] was
A) Ptolemy. B) Copernicus. C) Brahe. D) Aristotle. E) Plato.
Physics & Space Science