3
the manufacturer of a machine said that it is 86 percent
efficient. if you use 70 joules to run the machine (input work),
how much output work will it produce?

Plss anybody know how to do this? ? i need the answers from a through d

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

Ways that industry and agriculture use physical properties to separate substances