Two pennies are taking a circular ride on the record at right. Penny B is halfway to the outside. Penny A is on the outside.
In the example above, which type of force provides the centripetal force
a.) FN b.) Fg c.) Ft d) FF
e.) there is no centripetal force ab.) none of the above

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?

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation