Aray of light bends upon entering a new medium. what is this phenomenon called?
a. diffused reflection
b. reflection
c. reflaction
d. dispersion

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 main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Explain what will happen if decomposers were apsent from a forest ecoysystem.