The Fundamental Unit of Life — Science STD 9 — Question

How will you show that the slope of the displacement-time graph gives the velocity of the body?

As an incharge of a grain store, how will you find out the presence of pests?

Describe the various methods of controlling pests attacking stored grains.

Predict the total number of atoms in case:
Hydrogen sulphide.

A body floats in kerosene of density 0.8 × 10³ kg/m³ up to a certain mark. If the same body is placed in water of density 1.0 × 10³kg/m³, will it sink more or less? Give reason for your answer.

Calculate the pressure when a force of 200N is exerted on an area of: (i) 10m² (ii) 5m².

9.72g of potassium chloride dissolves in 30g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.

Draw a labeled diagram of the transverse section of this tissue.

By how much will the kinetic energy of a body increase if its speed is doubled?