The are used to change the vapor to a liquid and the liquid form back into a vapor the refrigeration cycle. A. condenser and compressor B. compressor and expansion device C. expansion device and evaporator D. condenser and evaporator

D.

Explanation: Condenser and Evaporator

Condenser: is a unit used in condensing a gaseous substance into a liquid state through cooling. By so doing, the latent heat is released by the substance and transferred to the surrounding environment.

Evaporator;  is a device thats turns the liquid form of a chemical substance such as water into its gaseous-form/vapor.

answer; i believe the correct answer is (solid gold);

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.