When the temperature in the air is 50°c, the velocity of a sound wave traveling through the air is approximately a. 381 m/s b. 30 m/s c. 50 m/s d. 361 m/s

The two required components for a generator are

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

Mixing salt in water is an example of physical change