Questions by anonymous

0 votes

1 answer

Explain why it is advisable to use the pressure cooker for cooking at high altitudes.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

The figure 4 below shows an object of mass 0.2kg whirled in vertical circle of radius 0.5m at uniform speed of 5m/s.

asked Aug 18, 2021 in Physics Form 4

0 votes

1 answer

Distinguish between angular and linear velocity.

asked Aug 18, 2021 in Physics Form 3

0 votes

1 answer

What is the gravitational potential energy stored in a spring when stretched through 4cm by a force of 2N

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

How much current is taken by a bulb whose rate is 100Ω and which is designed for mains supply of 240V?

asked Aug 18, 2021 in Physics Form 4

0 votes

1 answer

Figure 3 shows a small toy boat floating on water in a basin. X and Y are two points near the toy.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

The efficiency of a pulley system is always less than 100%. State two reasons.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

A student pulls a block of wood along a horizontal surface by applying a constant force. State the reason why the block moves at a constant.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

State why it is necessary to leave an air space in closed glass bottle of water when it is to be kept in a refrigerator.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

Figure 2 below shows a piece of wood fitted into a copper pipe and a piece of paper wrapped tightly around the junction.

asked Aug 18, 2021 in Physics Form 1

0 votes

3 answers

State the Archimedes principle.

asked Aug 18, 2021 in Physics Form 4

0 votes

1 answer

Briefly explain why rooms are at a lower level and ventilators at a higher level.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

A mercury barometer reads 760mmHg at sealevel and 700mmHg at the top of a mountain. If the density of mercury is 13,600kg/m3 and average density of air is 1.30kg/m3, calculate the height of the mountain.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

A solid weighs 32.5N on the surface of the moon. The force of gravity on the moon is 1.7Nkg-1. Determine the mass of the solid.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

The figure below shows the scale of a measuring instrument when measuring the thickness of an object.

asked Aug 18, 2021 in Physics Form 1

0 votes

1 answer

The flow chart below shows the large scale manufacture of ammonia gas and some ammonium compounds. Study it and answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 2

0 votes

8 answers

Give two reasons why wood and charcoal are chosen for domestic heating.

asked Aug 17, 2021 in Chemistry Form 4

0 votes

1 answer

Define heat value of a fuel.

asked Aug 17, 2021 in Chemistry Form 4

0 votes

2 answers

The diagram below shows an energy level diagram for the formation of magnesium chloride. Study it and answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4

0 votes

1 answer

Distinguish between hydration energy and lattice energy.

asked Aug 17, 2021 in Chemistry Form 4

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