Me with economics and you the question is going to be down in a attached file while the answers on here a: decreasing with b: less than c: not affected by d: greater than

Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f