Earthing the machines/using spikes
Wilfykil answered the question on March 23, 2019 at 09:00
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The diagram below shows a circuit with a capacitor C and a lamp L. When the sketch is closed at Y, the lamp L lights....
(Solved)
The diagram below shows a circuit with a capacitor C and a lamp L. When the sketch is closed at Y, the lamp L lights. When the switch is closed at X, L does not light. Explain the observation.
Date posted:
March 23, 2019
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Answers (1)
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The fig shows sketches of two types of houses built in a lighting prone area. State with reason which house is safer to stay in...
(Solved)
The fig shows sketches of two types of houses built in a lighting prone area. State with reason which house is safer to stay in during lighting and thunderstorms?
Date posted:
March 23, 2019
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Answers (1)
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State the observation on the leaves of a positively charged electroscope when a negative charge is brought near it.
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State the observation on the leaves of a positively charged electroscope when a negative charge is brought near it.
Date posted:
March 23, 2019
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Answers (1)
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Two isolated and insulated spheres A and B carry the same positive charge. Sketch the electric lines of force of their field when placed close...
(Solved)
Two isolated and insulated spheres A and B carry the same positive charge. Sketch the electric lines of force of their field when placed close to each other but not touching some.
Date posted:
March 23, 2019
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Answers (1)
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Name two types of forces which can act between objects without contact.
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Name two types of forces which can act between objects without contact.
Date posted:
March 22, 2019
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Answers (1)
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State with reason the purpose of the oil that circulates in a motorcar engine.
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State with reason the purpose of the oil that circulates in a motorcar engine.
Date posted:
March 22, 2019
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Answers (1)
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In the study of a free fall, it is assumed that the force f acting on a given body of mass m is gravitational, given...
(Solved)
In the study of a free fall, it is assumed that the force f acting on a given body of mass m is gravitational, given by F= mg. State two other forces that act on the same body.
Date posted:
March 22, 2019
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Answers (1)
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A student was heard saying “the mass of a ball on the moon is one sixth its mass on earth”. Give a reason why this...
(Solved)
A student was heard saying “the mass of a ball on the moon is one sixth its mass on earth”. Give a reason why this statement is wrong.
Date posted:
March 22, 2019
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Answers (1)
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Record as accurately as possible the masses indicated by the pointer in figures A
(Solved)
Record as accurately as possible the masses indicated by the pointer in figures A
Date posted:
March 22, 2019
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Answers (1)
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Explain how to calculate the efficiency of the pulley system when the weight of load and effort is given
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Explain how to calculate the efficiency of the pulley system when the weight of load and effort is given.
Date posted:
March 19, 2019
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Answers (1)
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A vacuum pump was used to pump out air from the glass tube immersed in liquids as shown in the figure below . After sometimes...
(Solved)
A vacuum pump was used to pump out air from the glass tube immersed in liquids as shown in figure below.
After sometimes the level of paraffin rose to position X.mark Y,the corresponding positions for the water level .Give a reason for your answer.
Date posted:
March 18, 2019
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Answers (1)
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Describe how you would measure the circumference of a pen using a thread
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Describe how you would measure the circumference of a pen using a thread.
Date posted:
March 6, 2019
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Answers (1)
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A metre rule is pivoted at the 20cm mark and it hangs at the 90cm mark from a spring balance 75g wt. Where is the...
(Solved)
A metre rule is pivoted at the 20cm mark and it hangs at the 90cm mark from a spring balance 75g wt. Where is the centre of gravity of the metre rule if it weighs 125g?
Date posted:
March 2, 2019
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Answers (1)
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A mass of 8kg is whirled round in a vertical circle using a rope of length 80cm,if it takes 2.5 cycles in 1 second,calculate the...
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A mass of 8kg is whirled round in a vertical circle using a rope of length 80cm,if it takes 2.5 cycles in 1 second,calculate the maximum tension the rope experiences.
Date posted:
March 1, 2019
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Answers (1)
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Distinguish between latent heat of fusion and specific latent heat of fusion of a substance
(Solved)
Distinguish between latent heat of fusion and specific latent heat of fusion of a substance.
Date posted:
March 1, 2019
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Answers (1)
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Suggest why the rate of heat flow through a pane of glass is greater on a windy day
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Suggest why the rate of heat flow through a pane of glass is greater on a windy day.
Date posted:
February 26, 2019
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Answers (1)
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What is the importance of studying Physics?
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What is the importance of studying Physics?
Date posted:
February 24, 2019
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Answers (1)
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An electric kettle with a shiny outer surface would be more efficient than one with a dull outer surface. Explain
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An electric kettle with a shiny outer surface would be more efficient than one with a dull outer surface. Explain
Date posted:
February 23, 2019
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Answers (1)
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Explain why metallic materials are better conductors of heat than non- metallic materials
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Explain why metallic materials are better conductors of heat than non- metallic materials.
Date posted:
February 23, 2019
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Answers (1)
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Heat transfer in fluids is by convection. Give the molecular explanation of conversation in fluids
(Solved)
Heat transfer in fluids is by convection. Give the molecular explanation of conversation in fluids.
Date posted:
February 23, 2019
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Answers (1)