This is a study guide my teacher gave me but I do not have an answer key so I wo

Question

This is a study guide my teacher gave me but I do not have an answer key so I would like answers for the whole page please.

shown above, two charges of equal magnituse are placed at opposite corners of a square of side length Which one of the isa correct expression for the magnitude of the following a electric force acting on qa? 41. In a certain process, a 400w electrical device is powered for 8 hours. If electrical energy costs 10 cents per kilowatt-hour, how much does this process cost? B. $0.32 S5.00 voltage twoles) A student connects a single resistor to a variable voltage source, then uses an ammeter to in the the current through the resistor at increasing voltages. The student's data is shown graph above. these to calculate the value of resistance, 0.045 C, 7.00 D. 1.60

Explanation / Answer

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40 ) D

41 ) B

total cost = 400*8*10^-3*0.1 = 0.32 dollar

42) B

R = V/I = 1 / 0.0455 = 22 ohm

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