1-a-A typical household circuit is capable of carrying 15.0 A ofcurrent at 120 V before the circuit breaker will trip. How many1500 W hair dryers can run off one such circuit?
b-In the rush to get ready for lecture, a physics professor leavesthe hairdryer described in the previous problem running and doesnot turn it off until he gets home 6.8 hr later. How much will thisadd, in dollars, to his next electric bill (assume electricitycosts $0.078 per kW hr)?
2-a-A 12 V lead-acid car battery, engineered for 'up to 500 or morecharge/discharge cycles', has a rating of 225.0 A*hr. (It sells for$180.00.) Calculate the total amount of charge that moves throughthe battery before it needs to be recharged.
b-What is the total electrical energy that the battery can deliverbefore it needs to be recharged?
1-a-A typical household circuit is capable of carrying 15.0 A ofcurrent at 120 V before the circuit breaker will trip. How many1500 W hair dryers can run off one such circuit?
b-In the rush to get ready for lecture, a physics professor leavesthe hairdryer described in the previous problem running and doesnot turn it off until he gets home 6.8 hr later. How much will thisadd, in dollars, to his next electric bill (assume electricitycosts $0.078 per kW hr)?
2-a-A 12 V lead-acid car battery, engineered for 'up to 500 or morecharge/discharge cycles', has a rating of 225.0 A*hr. (It sells for$180.00.) Calculate the total amount of charge that moves throughthe battery before it needs to be recharged.
b-What is the total electrical energy that the battery can deliverbefore it needs to be recharged?
