Parallaxes of stars were not observed by ancient astronomers. how can this fact be reconciled with the heliocentric hypothesis?

Hen a gfci receptacle device is installed on a 20-ampere branch circuit (12 awg copper), what is the minimum volume allowance (in cubic inches) required for conductor fill for each conductor in the outlet box?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

The molecular mass of a gas is (select all that apply) a. independent of the type of gas b. the same number as the atomic (or molecular) mass, but measured in grams c. dependent on the temperature d. the mass of a mole of the gas