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Floating a needle on water
Thoroughly dry a steel needle. Place it on the tines of a dinner fork and gently smash the surface of the water in a dish with the fork. If you are careful the needle will float as you take the fork away. Look at the water surface closely. Can you see how the surface film seems to curve under the weight of the needle ?
Reduction reaction Aldoses and ketoses are reduced to the corresponding polyhydroxy alcohols by sodium borohydride, sodium amalgam, etc. So, in this reaction, glucose
The angle of insolation on the Earth's surface is most direct at which latitude: At 0 o latitude
Where friction is desirable and undesirable at the same time.
Ask question how many years that our earth survived?#Minimum 100 words accepted#
how to cache images in java or jsp without using .htaccess??
Ascorbic acid possesses following important physico-chemical properties: a) It is a white crystalline substance. b) It is freely soluble in water. c) Solution of th
a food chain that does not start with plants??
A compressed air pop-gun Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil t
Objectives : After studying this unit, you should be able to 1. explain the need for safety and health regulations using an example, 2. describe the use of National Buildi
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