A10,000 n piano is dropped from the top of a building. when the piano reaches terminal speed…
a. what is the net force on the piano?
b. what is the force of air resistance on the piano?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b. refraction c. diffraction d. interference

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a. the kinetic energy increases. b.the kinetic energy decreases. c.the kinetic energy remains the same. d.the kinetic energy is always zero.