Recent questions without a selected answer

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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 by anonymous

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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 by anonymous

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1 answer

20cm3 of oxygen diffused through a porous partition in 70s .how long would it take 20cm3. Of sulphur VI oxide to diffuse through the same portion under the same condition.

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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1 answer

The rate of diffusion of neon was found to be 1.45 times faster than that of an equa! volume of gas X at room temperature. Determine the relative formula mass of gas X (Ne = 20.0).

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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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 by anonymous

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1 answer

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

asked Aug 18, 2021 in Physics Form 1 by anonymous

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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 by anonymous

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1 answer

Name two other gases which could be used to reduce copper II oxide.

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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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 by anonymous

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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 by anonymous

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1 answer

Hydrogen was passed over copper II oxide in a combustion tube.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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3 answers

State the Archimedes principle.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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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 by anonymous

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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 by anonymous

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1 answer

A compound W consist of 26.7%carbon, 2.2% hydrogen and the rest oxygen. It has a relative formula Mass of 90(C=12, H=1, O=16,)

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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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 by anonymous

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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 by anonymous

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1 answer

Explain the following observations

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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1 answer

Draw a dot (.) and cross (X) diagram to show the bonding in the molecules of : (Atomic number of carbon is 6, Oxygen is 8 and hydrogen is 1)

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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1 answer

The diagram below represents a luminous flame. disgram of luminous flame Mark and label on the diagram the hottest and coolest parts

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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