Why do all machines lose some energy while they operate? Choose all that apply

They run out of fuel.
They radiate heat.
The moving parts create friction.
High pressure gases move the piston.

What is the radius of the circular path ofa charged particle in a magnetic field?

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Describe uniform velocity and variable velocity in short