A person pulls a cart with a force of 10n a distance of 8m how much work is done on this cart

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

For which pair of objects would adding the same a

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?