English Medium इयत्ता ९ - CBSE Question Bank Solutions for Science

Draw a well labelled diagram of typical prokaryotic cell?

What do you understand by the kinetic energy of a body?

A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?

When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.

A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy? If the bullet strikes a thick target and is brought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet?

A car is accelerated on a levelled road and attains a speed of 4 times its initial speed. In this process, the kinetic energy of the car :

Write main differences between plant and animal cells.

The momentum of a bullet of mass 20 g fired from a gun is 10 kg.m/s. The kinetic energy of this bullet in kJ will be :

Which of the following does not posses the ability to do work not because of motion?

Name the positively charged particle present in the atoms of all the elements.

What is the positive charge on the nucleus of an atom due to?

Which subatomic particle was discovered by : Goldstein ?

Name the subatomic particle whose relative charge is : +1

Fill in the blank of the following statement :

The anode rays obtained from hydrogen gas consist of particles called ________

What is a proton? State its relative mass and charge.

What is the absolute mass and charge of a proton?

How does a proton differ from an electron?

All the gases from cathode rays  anode rays when electricity is passed through them :

What does the formation of anode rays tell us about the atoms?

What is a proton? How does it differ from a neutron?

(a) What are cathode rays? What is the nature of charge on cathode rays?

(b) Explain how, cathode rays are formed from the gas taken in the discharge tube.

(c) What conclusion is obtained from the fact that all the gases from cathode rays?