Why did Mendel select pea plant for his experiment ?
An effort 100N can rise load of 2000N in hydraulic press. Calculate area of a small piston. Area of large piston is 4m^2.Write application of hydraulic press.
Name the two instruments based on principle of flotation.
State Archimedes principle. Write the formula of Archimedes principle.
Why is weight of the body is less in water than in air?
Describe construction,working of hydraulic press.Prove it's effort multiplier.
Prove the relation between pressure, force and area. P= F/A
The focal length of convex lens is 2 cm and candle having height 1 cm is kept at distance of 4 cm from lens.What distance does the image of candle fall. Give the ray diagram .Calculate the magnification of the image.
Two defect of visions are given below . Write two differences for them.
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