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When the flask is placed in iced water the level on water rose and then fell. Explain this observation.
(Solved)
When the flask is placed in iced water the level on water rose and then fell. Explain this observation.
Date posted:
May 25, 2019
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Answers (1)
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An aircraft 300m from the ground traveling horizontally at 400m/s releases a parcel. Calculate the horizontal distance covered by the parcel from the point of...
(Solved)
An aircraft 300m from the ground traveling horizontally at 400m/s releases a parcel. Calculate the horizontal distance covered by the parcel from the point of release.(Ignore air resistance).
Date posted:
May 25, 2019
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Answers (1)
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Sketch a velocity – time graph for a body initially moving at a velocity u before a force F is applied to it for 5...
(Solved)
Sketch a velocity – time graph for a body initially moving at a velocity u before a force F is applied to it for 5 seconds and there after the force F is withdrawn.
Date posted:
May 25, 2019
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Answers (1)
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A bus that carries goods in the under seats carrier is more stable than one that carries goods in the carrier at the top. Explain...
(Solved)
A bus that carries goods in the under seats carrier is more stable than one that carries goods in the carrier at the top. Explain why this is so.
Date posted:
May 25, 2019
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Answers (1)
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The figure below shows a wire wound on a metal rod. The windings just touch each other. If the total number of complete loops was...
(Solved)
The figure below shows a wire wound on a metal rod. The windings just touch each other. If the total number of complete loops was found to be 25 and the distance covered by the windings on the rod is 0.6cm, find the radius of the wire giving your answer in standard form.
Date posted:
May 25, 2019
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Answers (1)
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A sharp point of a pin is held over a positively charged electroscope. State and explain the observation made on the electroscope.
(Solved)
A sharp point of a pin is held over a positively charged electroscope. State and explain the observation made on the electroscope.
Date posted:
May 25, 2019
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Answers (1)
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State why parabolic reflectors are used in car headlights
(Solved)
State why parabolic reflectors are used in car headlights.
Date posted:
May 22, 2019
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Answers (1)
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The figure below shows the path of a ray of light through a glass prism. The speed of yellow
light in the prism is 1.88 ×...
(Solved)
The figure below shows the path of a ray of light through a glass prism. The speed of yellow
light in the prism is 1.88 × 108m/s.
(i) Determine the refractive index of the prism material for the light (speed of light in vacuum, c
= 3.0 × 108m/s.
(ii) Show on the figure, the critical angle, c, and determine its value.
(iii) Given that r = 21.2º, determine the angle θ.
Date posted:
May 22, 2019
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Answers (1)
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In an experiment to determine the internal resistance of a cell, the following circuit was used.
It was noted that when S is open, the voltmeter...
(Solved)
In an experiment to determine the internal resistance of a cell, the following circuit was used.
It was noted that when S is open, the voltmeter reads 1.5V and when S is closed the voltmeter reads 1.3V and ammeter reads 0.2A.
(i) What is the e.m.f of the cell.
(ii) Determine the lost voltage.
(iii)Find the value of R.
(iv) Find the internal resistance of the cell.
Date posted:
May 22, 2019
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Answers (1)
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A car accumulator is rated 40Al and is expected to supply a constant current for 120 minutes. Calculate the amount of current delivered.
(Solved)
A car accumulator is rated 40Al and is expected to supply a constant current for 120 minutes. Calculate the amount of current delivered.
Date posted:
May 22, 2019
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Answers (1)
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A block and tackle system has 3 pulleys in the upper fixed block and two in the lower movableblock. What load can be lifted by...
(Solved)
A block and tackle system has 3 pulleys in the upper fixed block and two in the lower movable
block. What load can be lifted by the effort of 200N if the efficiency of the system is 60%?
Date posted:
May 22, 2019
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Answers (1)
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State two factors that reduce the stability of a vehicle while going round a banked bend.
(Solved)
State two factors that reduce the stability of a vehicle while going round a banked bend.
Date posted:
May 22, 2019
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Answers (1)
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The fig below shows a hydraulic press used to compress a bale
(i) Explain briefly ho a force applied on the lever compresses the bale.
(ii) Given...
(Solved)
The fig below shows a hydraulic press used to compress a bale
(i) Explain briefly ho a force applied on the lever compresses the bale.
(ii) Given that the area of piston B is 18cm2 and that of piston A 3.0cm3. A force of 2N is
applied to piston A, find the force produced on the larger piston B that compresses
the bale.
Date posted:
May 21, 2019
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Answers (1)
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Sketch on he axes provided a graph to show how mass per unit volume of water varies with
temperature when water is heated from 00 to...
(Solved)
Sketch on he axes provided a graph to show how mass per unit volume of water varies with
temperature when water is heated from 00 to 200
Date posted:
May 21, 2019
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Answers (1)
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A box of mass 500g is dragged along a level ground at a speed of 12m/s. if the force of friction
between the box and the...
(Solved)
A box of mass 500g is dragged along a level ground at a speed of 12m/s. if the force of friction
between the box and the floor is 2000N, calculate the power developed.
Date posted:
May 21, 2019
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Answers (1)
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The figure shows the velocity time graph of two identical spheres released from the surfaces of
two liquids A and B.
Give a reason why the terminal...
(Solved)
The figure shows the velocity time graph of two identical spheres released from the surfaces of
two liquids A and B.
Give a reason why the terminal velocity of the sphere In B is higher than in A.
Date posted:
May 21, 2019
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Answers (1)
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When a Bunsen burner is lit below wire gauze, it is noted the flame initially burns below the gauze as shown in the diagram below. After sometime, the flame burns...
(Solved)
When a Bunsen burner is lit below wire gauze, it is noted the flame initially burns below the gauze
as shown in the figure below.
After sometime, the flame burns below as well as above the gauze as shown in
Explain this observation
Date posted:
May 21, 2019
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Answers (1)
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An immersion heater rated at 180W is placed in a liquid of mass 2kg. When the heater is switched on for 7.5 minutes the temperature...
(Solved)
An immersion heater rated at 180W is placed in a liquid of mass 2kg. When the heater is switched on for 7.5 minutes the temperature of the liquid rises by 400C. Determine the specific heat capacity of the liquid.
Date posted:
May 21, 2019
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Answers (1)
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Other than oil patch being monolayer, state any one other assumption in the oil drop experiment.
(Solved)
Other than oil patch being monolayer, state any one other assumption in the oil drop experiment.
Date posted:
May 21, 2019
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Answers (1)
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Estimate the size of an oil molecule if a drop of oil of volume 6.0 × 10-10 m3 forms a patch of 32 on a water...
(Solved)
Estimate the size of an oil molecule if a drop of oil of volume 6.0 × 10-10 m3 forms a patch of 32 on a water surface.
Date posted:
May 21, 2019
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Answers (1)