Arefrigerator is removing heat from a cold medium at 3∘c at a rate of 5400 kj/h and rejecting the waste heat to a medium at 30∘c. if the coefficient of performance of the refrigerator is 2, the power consumed by the refrigerator is
(a) 0.5 kw
(b) 0.75 kw
(c) 1.0 kw
(d) 1.5 kw
(e) 3.0 kw

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave