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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 ?
Question: "Sociology Considered as a Scientific Discipline" Discuss the this statement with the relevant Examples Answer Sociology is the systematic study of Society. Soci
Acute and Chronic Effects : The effects of accidents due to chemicals are severe and immediate on the human body. These effects are called acute effects and can be traced without
INTRODUCTION : This exercise is based on here 'Laws and Regulations' of this course. What are we going to do in this exercise? - This might be the question arising in your mind. I
Simple hydraulic press The principle of the hydraulic press is illustrated by the following model. Half fill a cylindrical jar with water. Pour melted paraffin wax on the su
Ask question how many years that our earth survived?#Minimum 100 words accepted#
Fire Barriers : When a fire starts in a building it spreads quickly by: a) Radiation - Intense heat radiates to neighbouring surfaces which are rapidly heated to ignition poi
Another way to observe the buoyancy of water Push a large cork to the bottom of a pail of water. Notice the quantity of force you have to apply to hold the cork at the bottom.
Geometry and Astronomy: The need to portray an ideal world of perfect forms and proportions led to the development of geometry by Pythagoras (583-500 B.C.) and Hippocrates o
How do you explain the fact that clay soils which commonly have higher pore space than sandy soils are often more poorly aerated than sandy soils. Clay soils have higher pore s
who do u put a neddle thrwew a ballon
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