What is the positive work?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

Ascientific blank must be testable and capable of being proven false?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit