B. State whether the following statements are true or false. 1. A freely suspended bar magnet points in east-west direction.
2. Electromagnets used to remove nickel from a scrap of copper, zinc and nickel.
3. Magnets are stored in pairs such that same poles face each other.
4. When a bar magnet is broken into number of pieces each piece is complete magnet.
5. Opposite poles of two different magnets repel each other.

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.