To lubricate the engine/ reduce frictional force.
Wilfykil answered the question on March 22, 2019 at 10:00
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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
(Solved)
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
(Solved)
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...
(Solved)
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
(Solved)
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?
(Solved)
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
(Solved)
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
(Solved)
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)
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A pin hole camera forms an image of size 5 cm tall for an object placed 25 cm tall for an object placed 25 cm away from pinhole.if...
(Solved)
A pin hole camera forms an image of size 5 cm tall for an object placed 25 cm tall for an object placed 25 cm away from pinhole.if the height of the object is 5 cm. Find the length of the pin hole camera.
Date posted:
February 23, 2019
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Answers (1)
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How many images would be seen from two mirrors when reflecting surfaces make an angle of 60 degree with each other?
(Solved)
How many images would be seen from two mirrors when reflecting surfaces make an angle of 60 degree with each other?
Date posted:
February 23, 2019
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Answers (1)
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Explain 2 main branches of physics
(Solved)
Explain 2 main branches of physics.
Date posted:
February 20, 2019
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Answers (1)
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State one difference between ultra-violet rays and X-rays.
(Solved)
State one difference between ultra-violet rays and X-rays.
Date posted:
February 17, 2019
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Answers (1)
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State two safety precautions that should be observed when using electrical hand tools.
(Solved)
State two safety precautions that should be observed when using electrical hand tools.
Date posted:
February 13, 2019
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Answers (1)
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A fishing boat is at rest on sea water with a steel anchor over the side. Explain what would happen to the volume of displaced...
(Solved)
A fishing boat is at rest on sea water with a steel anchor over the side. Explain what would happen to the volume of displaced water by the boat when:
a) the anchor is lowered and left hanging in water
b) the anchor rests on the bed at the sea.
Date posted:
February 13, 2019
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Answers (1)