Select the two true statement about a free body diagram 1.) The arrow pointing down represents the force of gravity, and the arrow pointing up represents the force of the ground pushing back on the box

2.)The net force is unbalanced

3.)Gravitational force is pushing up on the box and the force of the ground is pushing down

4.)The net force is equal to zero

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.