Give reasons for the following:
(a) Cooking utensils are made of metals.
(d) False ceiling keeps the room warm during winters.
(e) Asbestos sheets are preferred over iron sheets for roofing.
(b) Pressure cooker is provided with bakelite handle.
(C) Air conditioned buildings have double-walled windows.
Answers
Explanation:
a) cooking utensils are made up of metal so that they can easily conduct the heat from the burner to the food and so that the food gets heated quickly and gets cooked.
b) pressure cooker have bakelite handle so that it doesn't conduct the heat and burn our hands.
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Answer:
a) Cooking utensils are made of metals Like copper and aluminium that helps them to pass the heat easily. Older cookware like tin or nickel coated and they were not used for cooking. But stainless steel is a good conductor of heat and it helps to cook food easily.
d) Because the false ceiling has air trapped in it and as air is a bad conductor of heat the doesn't move from room to outside . this keeps the room warm in winter .
e) It is so because asbestos is an insulator so keeps the room warm during winters and cool during summers. that's why asbestos sheets are preferred over iron sheets for roofing.
b) Bakelite is a special material that is used for its ability to resist heat. Bakelite does not conduct heat well, which makes it the perfect material for creating pressure cooker handles.
c) Air conditioned building have double walled windows because air trapped between two layers act as an insulator of which prevents outside heat entering into the building,this helps to keep the building cool.
Explanation: