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Q. An unknown mass of silver is dropped into a bucket containing 3 kg of water. The silver is heated to 689 K before being immersed in the water, and the water is initially at 0 C. The system comes to rest at 303 K. Ignoring any heat lost to the bucket or the air, what is the mass of the silver?

Q. Three astronauts, propelled by jet backpacks, push and guide a 115 kg asteroid toward a processing dock, exerting the forces, with F1 = 34 N, F2 = 57 N, F3 = 41 N, θ1 = 30°, and θ3 = 60°

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