Q1 brass is an alloy made from copper and zinc a 59 kg, Ask an Expert

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Q1. Brass is an alloy made from copper and zinc. A .59 kg brass sample at 98 C is dropped into 2.8 kg of water at 5 C. If the equilibrium temperature is 6.8 C, what is the specific heat of the brass?

Q2. Eight lights are associated in parallel to a 105 V source by two leads of total resistance 2.3. If 240 mA flows during each bulb, what is the resistance of each?

Q3. A 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater?

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