Electrical circuits must be locked-out/tagged-out before electricians work on any equipment. is this true or false?

Which of the following are guidelines to follow for obtaining accurate observations

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer