There's a good chance you're completing this HW on a laptop. A typical laptop uses about 15 W of power provided by a battery operating at 11.5 V. Under such conditions, 10 hrs is a typical lifetime of the battery.
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- E10P2Lightbulb A is marked "10.0 W 120 V," and lightbulb B is marked "60.0 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) In what time interval does 1.60 J pass into lightbulb A?(b) By what mechanisms does this energy enter and exit the lightbulb? Explain. (c) 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 typical cellular phone consumes an average of about 1.32 W of electrical power and operates on 3.80 V. HINT (a) What average current (in A) does the phone draw from its battery? A (b) Calculate the energy (in J) stored in a fully charged battery if the phone requires charging after 9.03 hours of use. J
- You have a battery with a voltage of Vtotal = 25 V and two resistors, both with a resistance of R, = R, %3D 40 0. a. How can you connect the resistors to the battery (in series or parallel) in order to achieve the largest power dissipation? How much power is dissipated in this case?If electrical energy costs $0.12 per kilowatt-hour, how much do the following events cost? (a) To burn a 120-W lightbulb for 24 h. $ (b) To operate an electric oven for 6.6 h if it carries a current of 20.0 A at 220 V. $