Nellie Newton does work on a box by pushing it with a constant force of 100 N over a distance of 4 m. (a) If Nellie pushes the object with twice the force over the same distance, how much work does she do? (b) If she pushes with the original force (100 N) over 8 m how much work does she do?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit