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

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space. b. we'll know it immediately because it will be brighter than the full moon in the sky. c. we won't know about it until 600 years from now. d. none of the above.