A child pulls a sled up a snow-covered hill. The child doe 513 J of work on the sled. If the child walk 15 m up he hill, how large of a force must the child exert?

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

What are similarities and differences of reflection, refraction, diffraction and absorption?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your