Physics, 17.12.2020 23:40, shelby8385
HELP ASAP TIMED TEST
A snowball is dropped from a height of H and reaches the ground with a speed of V. If you want to double the speed that the snowball has when it reaches the ground, at what height should you drop it from?
a
2H
b
4H
c
β2H
d
8H
e
16H
Answers: 1
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What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%
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