The average density of the Sun is on the order 10³ kg/m³. (a) Estimate the density of the Moon (in kg/m3). kg/m3
(b) Estimate the diameter of the Moon (in m). (Use your estimate from part (a).) m
(c) Given that the Moon subtends at an angle of about half a degree in the sky, estimate its distance from Earth (in m).

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.