Give scientific reasons:
(a) Cooking utensils are made of metals.
re
(b) A china cup is used for drinking hot te
because they are ha
(c) Blocks of ice are kept in sawdust.
(d) We use woollen clothes in winter.
Answers
Explanation:
a) Cooking utensils are made of metal such as copper, aluminium, brass, steel etc., so that heat is easily conducted through the base to their contents. But they are provided with handles of bad conductors (such as ebonite or wood) to hold then easily as handles will not conduct heat from the utensil to our hand.
b) Because China cup is a bad conductor of heat, so it does not heat up easily when hot tea is poured into it and prevent tea to get cold and not let our hand to get burn.
c) The air filled in the fine pores of saw dust is an insulator of heat. This air does not allow heat from outside to pass to the ice thereby preventing its melting.
d) We wear woollen clothes in winter because air is a poor conductor of heat and woollen clothes do not allow the transfer of body heat to the environment and keep us warm. The wool is structured so there is air trapped inside. Air is a very good insulator.
Answer:
66323333shfzhc is the only one that though you can get a short modem following world bell