Richard and Kokewa are using bar mognets in a science lesson. They begin to throw mognets on the floor. When they pick the bar mognets up they no longer work. The mognets have become whar

demagnetized they have lost their magnetic properties

answer; i believe the correct answer is (40,000 j) good luck

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27