Answer:

Given:
Input Power (
)= 1000 W
Mass (m) = 100 kg
Height (h) = 10 m
Time (t) = 16 s
To Find:
Efficiency of the motor
Explanation:










Efficiency of the motor = 62.5 %
The correct answer is B. barometer
Thermometer is used to measure temperature, anemometer is used to measure wind speed, while a hygrometer is used to measure humidity.
The answer is B. the speed of light in a vacuum. The speed of light in a vacuum cannot vary because there are no extraneous forces to act upon the light waves inside of the vacuum.
Hope this helps!