A young child holds a string attached to a balloon. What is the reaction force to the balloon pulling up on the string? A. The balloon pulls up on the Earth.
B. The string pulls the balloon up.
C. The Earth pulls the balloon down.
D. The string pulls the balloon down.

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.