Atuning fork vibrating at a frequency of 512hz is held over the top of the jar filled with water and filled with a tap at the bottom. if the jar is 60cm tall and the speed of sound is 350ms-1, determine 1st and 2nd resonance.

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.