A 0.40 kg mass attached to an ideal spring oscillates horizontally with a period of 0.50 s and amplitude of 0.20 m.
What is the spring constant of the spring?

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

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

Properties seen when one one substance changes to another are known as properties