An air conditioner using R-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain a space at T=22 C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of T=2C is allowed for the transfer of heat in the evaporator.

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is