The diagram below represents a block sliding across a table at a constant speed. All forces are shown except the frictional force. What is the magnitude of the
frictional force on the block?
2.5 N
1.7 N
2.5 N

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.