Probability that with random quessing
A multiple-choice test consists of 77 questions with possible answers of a, b, c, d, e. Estimate the probability that with random quessing, the number of correct answers is at least 33.
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Consider a refrigerator that keeps its contents at 9 degrees Fahrenheit when the house temperature is 73 degrees Fahrenheit. What is the maximum theoretical coefficient of performance, CP, for this refrigerator?
What is the net flow rate of energy (in watts) from the sphere to the vessel? For simplicity, assume the sphere and the vessel are both ideal blackbody radiators, with emissivity e = 1.
Your friend wants to pay off her two debts in a single payment. The first debt is $570 due in 8 months, and hte second is $1,380 due 1 1/2 in years. What will that single payment be if she wants to make it at the end of 1 year given a compound int
Consider a group of 20 molecules with the following speeds: three have speed 1 m/s, four have 6 m/s, five have 9 m/s, and eight have 12 m/s. Determine the rms speed (in m/s) of the molecules in this group at this instant in time.
(a) Is the electric force between A and B attractive, repulsive or zero? (b) What is the magnitude of the electric force between the balls?
A 15cm diameter circular wire loop carries a current of 2.4A . a) Find the torque on the loop in a 1.4T magnetic field directed perpendicular to the loop.
Two long parallel wires each carry 2.8A in the same direction, with their centers 1.8cm apart. Express your answer to two significant figures and include the appropriate units. a) Find the magnitude of the magnetic field halfway between the wires.
A fair coin is tossed 500 times. Find the probability of obtaining more than 300 heads.
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