A 50-kg sack is lifted 2 m in the same time as a 25-kg sack is lifted 4 m. The power expended in raising the 50-kg sack compared to the power used to lift the 25-kg sack is
A) twice as much.
B) half as much.
C) the same.
C
You might also like to view...
The El Niño begins to weaken and eventually terminates when
A) the leading edge of the cold Kelvin wave finally reaches the eastern coast of South America. B) cold water spreads out away from the equator, bringing warm upwelling waters from depth. C) cold water converges on the equator, bringing cold upwelling waters from depth. D) warm water spreads out away from the equator, bringing cold upwelling waters from depth.
Saudi Arabia holds the record for the warmest surface air temperature ever recorded at 136 degrees Fahrenheit
Indicate whether the statement is true or false
Shorter wavelengths tend to have a lower frequency
Indicate whether the statement is true or false
How did the joints in this photograph form?
A) From uplift
B) From burial
C) From tectonics
D) From weathering
E) From cooling