The three common isotopes of magnesium have masses of 25, 26, and 27 amu. The differences in mass are attributed to the number of (the multiple choice answers are in the picture above) :)

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

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.

How can waves travel through ground?