The earth's place in space can be described as
a. second planet from the sun in the milky way galaxy
b. third planet from the sun in the milky way galaxy
c. fourth planet from the sun, near alpha centauri
d. an elliptical orbit around the sun in the andromeda galaxy

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Does anyone have the answers to online physics course plato course physics, semester a v3.0

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)