As a student is sitting in her chair, she is not moving. However, there are forces that are acting on her. What must be true about the forces that are acting on the student?
They are acting in the same direction and are not balanced.

They are acting in opposite directions and are not balanced.

They are acting in opposite directions and are balanced.

They are acting in the same direction and are balanced.

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.