Acopper wire is stretched by 0.5% of it's length, calculate the energy stored per unit volume in the wire. young's modulus = 1.2 × 10^4 n/m2

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

What is the fate of the electrons that interact with a specimen in an electron microscope?

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.