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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 ?
Explain Gut secretions - External Defence Mechanism From the saliva and respiratory tract, bacteria reach the gut, here they are killed by the hydrochloric acid and proteolytic
why don''t we have a crtical point on the solid liquid equilibrium line as we have on the liquid-vapour line...
describe the typical conditions necessary for fossil formation?
I Want to study Zoology but I''m not sure which branch to study and how this all works. I want to study mammals, but how do I get there exactly? Also I was thinking about Vertebrat
Plaster of Paris Secure some plaster of Paris and mix a small amount with water. It must be worked quickly or it will harden whereas being mixed. Place the mixture in moulds an
INTRODUCTION : You may find this exercise as a practical illustration for the procedure generally followed in the disposal of unserviceable and obsolete items in a laboratory. It
methods of heat transfer
Calculate the power of a light bulb that uses 36J of electrical energy in 6 seconds.
Objectives After studying this unit you should be able to: 1. state the principal hazards of biology lab work, 2. describe the ways to minimize these dangers, 3. ex
Minerals: Our bones and teeth contain large amounts of calcium. An adult has a total of about 1 kg of calcium and a baby has about 30g in their bones. So, during the period o
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