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Air expands when heated
To show that air expands when heated, fit an electric light bulb flask or a bottle with a single- whole stopper or cork which has a 30-cm length of glass tubing or a soda straw by it. Place the end of the tube in a small bottle of water. Heat the flask and view what happens. Heat the flask until a considerable amount of air has been separated and then cool the flask by pouring cold water over it or by rubbing with a piece of ice.
Describe Common elements that make up the minerals of the Earth's crust? The Earth's crust, which is the layer of the Earth we are on now, is made of numerous minerals and rock
is pencil translucent or opaque?
A simple mercury barometer Seal single end of a glass tube about 80 cm in length by rotating it in a gas flame. The tube should be held as almost vertical as possible. Join a s
Measuring atmospheric pressure with a bicycle pump A bicycle pump with the washer reversed as represents can be used to calculate atmospheric pres- sure. The piston can be made
assignment for natural rubber
Define Ishihara's Charts - Colour Blindness Colour blindness is often assessed using Ishihara's charts. If ever you visited an eye specialist, you too must have seen this chart
Microbes: You should know that invisible microbes are present everywhere, because they can surviveeven under very inhospitable conditions. They are all around us, in the air
What determines sinking and floating? Shape a piece of lead, tin or aluminium foil into the form of a little boat and float it on the water in a pan; now wad the metal foil fro
Hazard Identification : Each United Nations hazard class (with the exception of class 9) has a distinctive diamond shaped label bearing a pictogram for quick hazard recognition. F
A weather house Changes in the amount of water vapour are in the atmosphere can be indicated by variation in tension in a few strands of human hair or by using the hygroscopic
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