Ionic compounds have high melting points. this can best be explained by the fact that the bonds in ionic compounds a. involve the sharing of electrons. b. require a great deal of energy to break. c. occur between metals and nonmetals. d. form between a positively charged atom and a negatively charged atom.

More solar radiation is absorbed by earth’s surface than by

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

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these