Aristotle believed that objects falling to the ground fall at a constant rate of speed
a. True
b. False
Indicate whether the statement is true or false
True
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When the Moon is 90° west of the Sun, the Moon is in the ______________ phase
Fill in the blank(s) with correct word
A proton (+1.6 × 10^?19 C) moves 15.0 cm along the direction of an electric field of strength 3.0 N/C. The electrical potential difference between the proton's initial and ending points is:
a. 4.5 × 10^?19 V. b. 0.45 V. c. 24 V. d. 0.55 V. e. zero
A guitar-like stringed instrument has a string that is 16 cm long. It sounds the musical note A (440 Hz) when played without fingering. By what distance should you shorten it to play the note C (523 Hz)?
A) 1.7 cm B) 3.4 cm C) 2.5 cm D) 4.2 cm
The Q of a nuclear reaction is equal to:
a. the total charge involved. b. energy associated with the change in mass. c. energy associated with momentum conservation. d. the exothermic endothermy.