A raindrop fell 9.1 meters directly toward the ground at a constant velocity. It took the raindrop 2.6 seconds to fall that far. What was the raindrop's velocity?
Write your answer to the tenths place.

What was the first instrument to ever record an earthquake?

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

What are the north and south poles of a solenoid change with?