78°F is how many degrees Celsius?
a. 26
b. 172
c. 34
d. 18
e. 51
a
Physics & Space Science
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Why does a cloud speed up once it starts to collapse?
A: A black hole sucks it in B: As particles clump together, their gravitational attraction grows C: The heat makes the cloud particles swirl around D: All of the above E: None of the above
Physics & Space Science
A musical tone, sounded on a piano, has a frequency of 460 Hz and a wavelength in air of 0.50 m. What is the wave speed?
a. 920 m/s b. 270 m/s c. 230 m/s d. 109 m/s e. 115 m/s
Physics & Space Science
A stone is dropped from the top of a well that has water in it at a depth of 30.0 m. How long does it take the stone to reach the water?
Physics & Space Science
The unit of capacitance, the farad, is dimensionally equivalent to which of the following?
a. J/V c. V×C b. C/V d. V/C
Physics & Space Science