This is the hardest riddle by Albert Einstein.. Give correct answer or say nothing
Wrong answer will be reported

Aregular polygon has angkes of size 150° each.how many side has the polygon

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

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.