Describe the general relationship between the mass applied and the extension on the spring. 20 points Mass (g) extension of spring (cm)

0 0

100 0.5

200 0.6

300 0.8

400 1.5

500 2.5

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

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