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Q. A 400g glass coffee cup is at room temperature, 20 C. It is then plunged into hot dishwater at 80 c. If the temperature of the cup reaches that of the dishwater how much heat does the cup absorb. Assume the mass of the dishwater is large enough so its temp doesn't change appreciably. 15900 J

Q. If vector B is added to C = 2.0 ihat + 3.0 jhat, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of C. What is the magnitude of vector B?

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