The speed of the Earth in its orbit around the Sun is 29.77 km/s, and the best
estimate for the mass of the Earth is
5.976x1024 kg. What is the kinetic
energy of the Earth in its orbit around the
Sun?
KE = [?] x 10 J

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.

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?