A600-g block is dropped onto a relaxed vertical spring that has a spring constant k =190.0 n/m. the block becomes attached to the spring and compresses the spring 37.5 cm before momentarily stopping. while the spring is being compressed, what work is done on the block by the gravitational force on it?

If forces acting on an object are unbalanced. true or false

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

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