Devonte pushes a wheelbarrow with 830 W of power. How much work is required to get the wheelbarrow across the yard in 11 s? Round your answer to two significant figures. It takes
J of work to get the wheelbarrow across the yard.

The consumption of fossil fuels could be

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?