g Additional Problem: If you stand on a horizontal floor, a distance x directly in front of a vertical mirror, and the top of the mirror is level with the top of your head, what must be the minimum height of the mirror be, in order for you to be able to see your feet in the mirror

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

When using the scientist method, which step comes last?