If the mass of an object is 5 kg, the gravitational field strength is 2 ms-2 and the change in height is 5 m, what is the change in gravitational potential energy stored?

Which best represents the law of conservation of mass ?

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

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.