(English Medium) ICSE Class 9 - CISCE Question Bank Solutions

A circular cycle track has a circumstance of 314 m with AB as one of its diameter. A cyclist travels from A to B along the circular path with a velocity of constant magnitude 15. 7 m/ s. Find :
(a) The distance moved by the cyclist.
(b) The displacement of the cyclist if AB represents north-south direction .
(c) The average velocity of the cyclist.

A body goes from A to B with a velocity of 30 ms^-1 and comes back from B to A with a velocity of 20 ms^-1. What is the average velocity of the body for the whole journey?

A body moves along a straight track. Half of the distance it covers with a velocity of 40 ms^-1 and the remaining half with a velocity of 60 ms^-1. What is the average velocity for the whole journey?

The graph shows how the velocity of a scooter varies with time in 50 s. Interpret the graph.

Figure represents graphically the velocity of a car moving along a straight road over a period of 100 hours.

How long is the body travelling with a uniform velocity?

Give reason of Water pipes burst in severe winter.

What do you mean by the anomalous expansion of water? 

At what temperature is the density of water is maximum? State its value. 

Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C. 

Describe an experiment to show that water has maximum density at 4°C. What important consequences follow this peculiar property of water? Discuss the importance of this phenomenon in nature. 

Explain the following

Fishes survive in ponds even when the atmospheric temperature is well below 0°C.

Explain the following

A hollow glass sphere which floats with its entire volume submerged in water at 4°C, sinks when water is heated above 4°C.

Explain the following

A glass bottle completely filled with water and tightly closed at room temperature is likely to burst when kept in the freezer of a refrigerator. 

Water is cooled from 4 °C to 0 °C. It will :

Density of water is maximum at :

Distinguish between D.C. and A.C.

Figure. below shows two conductors A and B. Their charges and potentials are given in diagram. State the direction of (i) flow of electrons and (ii) flow of current, when both the conductors are joined by a metal wire.

What is a neutral point? How is the position of neutral point located with the use of a compass needle?

State the positions of neutral points when a magnet is placed with its axis in the magnetic meridian and with its north pole (i) pointing towards the geographic north and (ii) pointing towards the geographic south.