what energy is used for communication,warning entertainment but can also cause bodily harm?
A.heat
B.light
C.electrical
D.sound

How is heat transfered in a microwave oven
A.by boiling
B.by conduction
C.by convection
D.by radiation


What energy is given off when materials converts electricity to light energy?
A.electrical
B.electrical
C.heat
D.sound​