I need help in these 2 questions please

Anonymous
timer Asked: Jan 24th, 2019
account_balance_wallet $10

Question Description

I need help please with these 2 questions I tried three times but still stuck on them!


Q1) A charge of -2.90 nC is placed at the origin of an xy-coordinate system, and a charge of 1.85 nC is placed on the y axis at y = 3.95 cm .

Part A

If a third charge, of 5.00 nC , is now placed at the point x = 2.55 cm , y = 3.95 cm find the x and y components of the total force exerted on this charge by the other two charges.

Express answers numerically separated by a comma

Part B

Find the magnitude of this force.

Part C

Find the direction of this force.

Q2) A refrigerator has a coefficient of performance of 2.25, runs on an input of 135 W of electrical power, and keeps its inside compartment at 5C.

Part A

If you put a dozen 1.0-L plastic bottles of water at 31C into this refrigerator, how long will it take for them to be cooled down to 5C?(Ignore any heat that leaves the plastic.)

t=............... min

Tutor Answer

madushan
School: Boston College

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Review

Anonymous
Thanks, good work

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