The capacity of a storage battery, such as those used in automobile electrical systems, is rated in ampere-hours (A - h). A 50 A-h battery can supply a current of 50 A for 1.0 h, or 25 A for 2.0 h, and so on. What total energy can be supplied by a 14 V, 70 A - h battery if its internal resistance is negligible? Express your answer in joules. ? x•10" U =

What are the expected readings of the following in the figure below? (R = 9.50 Q, AV = 6.50 V) A AV 10.0 N 5.00 N + R 4.50 V (a) ideal ammeter (Give your answer in mA.) (b) ideal voltmeter (Give your answer in volts.) V (c) What If? How would the readings in the ammeter (in mA) and voltmeter (in volts) change if the 4.50 V battery was flipped so that its positive terminal was to the right? ideal ammeter ideal voltmeter V

> Lightbulb A is marked "60.0 W 120 V," and lightbulb B is marked "100 W 120 V." These labels mean that each lightbulb has its respective power delivered to it when it is connected to a constant 120-V source. (a) Find the resistance of each lightbulb. Ω RA RB Ω = (b) During what time interval does 1.20 C pass into lightbulb A? S (c) Is this charge different upon its exit versus its entry into the lightbulb? Yes No Explain. This answer has not been graded yet. (d) In what time interval does 1.40 J pass into lightbulb A? S (e) By what mechanisms does this energy enter and exit the lightbulb? Explain. This answer has not been graded yet. (f) Find the cost of running lightbulb A continuously for 30.0 days, assuming the electric company sells its product at $0.110 per kWh. (

A portable coffee heater supplies a potential difference of 12.0 V across a Nichrome heating element with a resistance of 1.92 Ω.   (a) Calculate the power (in W) consumed by the heater.  W (b) How many minutes would it take to heat 1.13 kg of coffee from 20.6°C to 46.2°C with this heater? Coffee has a specific heat of  4184  J (kg · °C) .  Neglect any energy losses to the environment.  min

15- A heart defibrillator passes 11.5 A through a patient's torso for 5.00 ms in an attempt to restore normal beating. (a) How much charge passed? ____C(b) What voltage was applied if 476 J of energy was dissipated? _____kV(c) What was the path's resistance? _____kΩ(d) Find the temperature increase caused in the 8.00 kg of affected tissue. The specific heat of tissue is 3500 J/(kg · °C). _____°C

(a) Find the voltage drop (in V) in an extension cord having a 0.0650 Ω resistance and through which 5.45 A is flowing.  V   (b) A cheaper cord utilizes thinner wire and has a resistance of 0.340 Ω. What is the voltage drop (in V) in it when 5.45 A flows?V   (c)Why is the voltage to whatever appliance is being used reduced by this amount? What is the effect on the appliance?