What are the internal resistance of the battery
A real battery has emf ε= 50.0 V. When it is connected to a 20.0-Ω resistor, the current is 2.45 A. What are the internal resistance of the battery and the potential differnce between its terminals?
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Determine the radiosity at the top plate surface, the net radiation heat flux at the top surface, and the rate at which the temperature of the plate is changing with time.
What is the expected profit? (note: profit is defined as the difference between cost and revenue). Using expected profit as the decision criterion, does it pay for the store to lease a fourth video camera during June at a cost (to them) of $10 a d
Determine the coefficient of performance of the refrigerator and compare with the COP of a reversible refrigerator operating between the same reservoirs.
A wire of length L and resistance R is cut in half, and the two halves are connected in parallel. What is the resistance of the parallel combination?
What mass (ingrams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to vaporize 1 mole ofwater.)
A researcher expects the population proportion of Cubs fans in Chicago to be 80%. The researcher wishes to have an error of less than 5% and to be 95% confident of an estimate to be made from a mail survey. What sample size is required? (Please ca
In a survey of 500 people, 60% responded with agreement to an attitude question. Calculate a confidence interval at 95% to get an interval estimate for a porportion.
A block of iron absorbs 5,400 joules of heat. If the temperature increases from 22 C to 32 C, what is the mass of the block? The specific heat of iron is 450 J/kg degrees celsius.
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