Newly published past papers questions.

Question No:6840

A study that deals with constellation, solar system and cosmos is referred to as

1. Electromagnetism
2. Structure and properties of matter
3. Light
4. Astronomy
5. Geophysics

Question No:6841

Which of the following burning medium requires a carbon dioxide extinguisher?

1. Organic solids
2. Flammable liquids and gases
3. Flammable gases
4. Combustible metals
5. Electrical hazards

Question No:6842

The initial volume of a liquid in a burette was 57cm³ . If X cm³ of the liquid was poured out of the burette and the final volume of the liquid remaining was 23cm³ , calculate the value of X.

1. 80cm³
2. 50cm³
3. 34cm³
4. 46cm³
5. -46cm³

Question No:6843

Classify the force experienced when a metal solid or a hard object is twisted.

1. Compression
2. Stretching
3. Restoring
4. Torsion
5. Friction

Question No:6844

Calculate the relative density of an object that weighs 3.5N when in air and 2.8N when fully immersed in water.

1. 0.8
2. 6.4
3. 5.0
4. 0.22
5. 3.5

Question No:6845

Why can water strides and pond skaters walk on water without sinking?

1. Because of the process of osmosis
2. Because of the property of capillarity
3. Because of the presence of impurities in water
4. Because of the force of surface tension
5. Because of the force of cohesion and adhesion

Question No:6846

Identify the statement that describes the Pascal`s Principal of transmission of pressure in fluids.

1. Pressure is equally transmitted in liquid.
2. Pressure is the ratio of force to area.
3. Pressure depends on the height of the liquid column.
4. Pressure is affected by the force of gravity.
5. Pressure produces upthrust.

Question No:6847

Suppose an engine raises 200kg of water steadily through a height of 60m in 20sec. The upward force is equal to the weight of water raised. Calculate the power in kW.

1. 6kW
2. 3kW
3. 5kW
4. 7kW
5. 4kW

Question No:6848

The following statements about magnetic lines of force are correct except:

1. Always form close loops
2. Start at north pole and end at the south pole.
3. Cross one another
4. Stronger where the lines are closer together
5. Pass through all materials, both magnetic and non-magnetic.

Question No:6849

What is the distance and displacement covered by an athlete who runs 100m to the North, 70m to the East , 100m to the South and 70m to the West to complete the race?

1. Distance is 0m and displacement is 340m
2. Distance is 340m and displacement is 0m
3. Distance is 340m and displacement is 340m
4. Distance is 0m and displacement is 0m
5. Distance if 700m and displacement id 700m.

Question No:6850

Match the properties or functions of the simple machines in List A with their corresponding names of the machines in List B by writing the letter of the correct response beside the corresponding item number in the answer booklet provided.

Question No:6851

A convex mirror is often used as the wing mirror of a car instead of plane mirror. Justify this statement giving one point.

Question No:6852

A camera is used to take a close-up picture of an object 3cm tall. If the object is positioned 24cm in front of the lens and a focused image is formed on the film 12cm behind the lens, determine the focal length of the camera lens and the height of the image formed on the film.

Question No:6853

Why is it practical to make a barometer with water instead of using mercury?

Question No:6854

A force of 200N and 20cm long and 150N and 30cm long spanner were separately used to loosen the left and right front car tire nuts, respectively. Show that the 30cm long spanner will be more effective than the 20cm long spanner.

Question No:6855

Why while swimming, the swimmer pushes the water backward with his hands?

Question No:6856

Figure 1 shows two simple machines A and B having the same efficiency. Justify that simple machine A requires minimum effort to raise a load of 5000N.

Question No:6857

Figure 2 shows a bimetallic thermostat strip used to regulate the temperature of the room by using a heater and a cooler.Which device between A and B is a heater? Justify your answer.

Question No:6858

Demonstrate by using a diagram on how heat transfer by convection takes place when water is heated?

Question No:6859

Compare the effect of frequency and amplitude to musical sound. Give two points each.

Question No:6860

With the aid of a diagram, compare the penetrating ability of the three types of radiations on a piece of paper, aluminium sheet and lead block.

Question No:6861

Why are the surface waves more dangerous than the primary and secondary waves?

Question No:6862

Describe three uses of constellations.