2an aqueduct consists of arches made up of blocks (stones) subjected to to sustain the weight of the structure and water it carries. only gravitational force 1 tensile force 2 both tensile and compressive forces 3 only elastic force 4 compressive force 5 adhesive force of cement 6

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

If a simple machine reduces the strength of a force, what must be increased?

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