Why is a broken lightning conductor dangerous?

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

What is meant by the statement" the melting poin of glycerine is 13 degree celsius