A lightbulb has a power of 12 W. It has an efficiency of 80%. Calculate the amount of time taken in seconds for the bulb to transfer 300 J of energy
into light energy.

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?

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

Select all the correct answers. which three statements about electromagnetic radiation are true?