A 950 g piece of metal at 95°C is placed in 450 g of water at 30°C. If the equilibrium temperature was 40°C, what was the specific heat of the metal? Ignore the effects of the container.
O 0.450 J/(g°C)
O 1090 J/(kg °C)
O 0.361 J/g °C
O 361 J/(g°C)

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2

What is a costume plot? why is it important to a film or theater production?