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sharon kalunda answered the question on September 12, 2019 at 10:20
- The figure below shows a bimetallic strip in electric circuit made of two metals A and B. B expands more than A.(Solved)
The figure below shows a bimetallic strip in electric circuit made of two metals A and B. B expands more than A.
X and Y are metal contact while P and Q are identical bulbs. Explain the effect on the bulb when ice cold water is poured onto the strip.
Date posted: September 12, 2019. Answers (1)
- Three identical springs each of spring constant 10N/m and weight 0.5N are used to support a load as shown.(Solved)
Three identical springs each of spring constant 10N/m and weight 0.5N are used to support a load as shown.
Determine the total extension of the system.
Date posted: September 12, 2019. Answers (1)
- The graph below is a sketch of a velocity-time graph of a car which was travelling at a constant velocity before the brakes were applied....(Solved)
The graph below is a sketch of a velocity-time graph of a car which was travelling at a constant velocity before the brakes were applied. Calculate the distance traveled after the brakes were applied.
Date posted: September 12, 2019. Answers (1)
- Distinguish between threshold frequency and threshold wavelength.(Solved)
Distinguish between threshold frequency and threshold wavelength.
Date posted: September 12, 2019. Answers (1)
- The figure below shows an object placed infront of a prism as shown.
Using two rays show the image of the object as observed by an...(Solved)
The figure below shows an object placed infront of a prism as shown.
Using two rays show the image of the object as observed by an observer at E.
Date posted: September 12, 2019. Answers (1)
- Give a reason why lecture theatre halls are covered with soft perforated materials.(Solved)
Give a reason why lecture theatre halls are covered with soft perforated materials.
Date posted: September 12, 2019. Answers (1)
- Explain why a p-n junction diode will conduct when connected in forward bias.(Solved)
Explain why a p-n junction diode will conduct when connected in forward bias.
Date posted: September 12, 2019. Answers (1)
- The figure below shows a combination of capacitors across a power supply.(Solved)
The figure below shows a combination of capacitors across a power supply.
Determine the energy stored in the system of capacitors.
Date posted: September 12, 2019. Answers (1)
- State one differences between an image formed by a plane mirror and that observed through a pinhole camera.(Solved)
State one differences between an image formed by a plane mirror and that observed through a pinhole camera.
Date posted: September 12, 2019. Answers (1)
- The diagram below shows an electrical appliance connected to the mains.(Solved)
The diagram below shows an electrical appliance connected to the mains.
I. Name the color codes for leads A and B
II. What is the purpose of the fuse.
Date posted: September 12, 2019. Answers (1)
- A car of mass 800kg starts and accelerates at 1.2ms-2. Determine its momentum after it has moved 400m from the starting point.(Solved)
A car of mass 800kg starts and accelerates at 1.2ms-2. Determine its momentum after it has moved 400m from the starting point.
Date posted: September 12, 2019. Answers (1)
- The figure below represents a sphere 0.012m³ volume and mass 5kg floating between two liquids A and B such that 2/3 of its volume is...(Solved)
The figure below represents a sphere 0.012m³ volume and mass 5kg floating between two liquids A and B such that 2/3 of its volume is in liquid A. Density of liquid B is 800kg/m³
(Take g = 10N/kg).
a.Determine
(i) Weight of liquid B displacement.
(ii) Weight of liquid A displaced.
iii) Volume of A.
b.The sphere is now anchored at the base of the container that ¼ of its volume is in liquid A. Find the tension in the string.
Date posted: September 12, 2019. Answers (1)
- Calculate the total power in lifting 0.2kg of metal cane containing 2000cm³ of ice onto a lorry as shown below within 4S. Density of ice...(Solved)
Calculate the total power in lifting 0.2kg of metal cane containing 2000cm³ of ice onto a lorry as shown below within 4S. Density of ice is 0.9g/cm³
Date posted: September 12, 2019. Answers (1)
- Explain the energy change that occur when a man climbs the mountain.(Solved)
Explain the energy change that occur when a man climbs the mountain.
Date posted: September 12, 2019. Answers (1)
- A loudspeaker is a transducer. Explain.(Solved)
A loudspeaker is a transducer. Explain.
Date posted: September 12, 2019. Answers (1)
- The figure below shows a tape from a trolley accelerating at 5m/s and the timer is vibrating at 100HZ.(Solved)
The figure below shows a tape from a trolley accelerating at 5m/s and the timer is vibrating at 100HZ.
(i) Change in velocity from A to B.
(ii) The final velocity of the trolley.
Date posted: September 12, 2019. Answers (1)
- Calculate the impulse of force produced when a table is pulled for 3 seconds by a constant force of 10N towards the right and then...(Solved)
Calculate the impulse of force produced when a table is pulled for 3 seconds by a constant force of 10N towards the right and then for 2 seconds by a constant force of 20N towards the left.
Date posted: September 12, 2019. Answers (1)
- A stone is thrown vertically upwards from the base of a mountain with an initial velocity of 100m/s. The stone just stopped as the apex and...(Solved)
A stone is thrown vertically upwards from the base of a mountain with an initial velocity of 100m/s. The stone just stopped as the apex and came back. Another boy projected a stone horizontally from the top of the mountain. Calculate:
(a) Height of the mountain.
(b) Time taken for the stone to follow the trajectory.
(c) The range if the horizontal velocity is 20m/s.
Date posted: September 12, 2019. Answers (1)
- A pipe of radius 2mm is connected to another pipe of radius 6mm. If water flows in the narrow pipe at a speed of 3m/s,determine...(Solved)
A pipe of radius 2mm is connected to another pipe of radius 6mm. If water flows in the narrow pipe at a speed of 3m/s,determine the speed of water in the wider pipe.
Date posted: September 12, 2019. Answers (1)
- A spring extends by 4cm when a load of 10N is suspended from it. Six similar springs are used in the system shown in figure.Determine...(Solved)
A spring extends by 4cm when a load of 10N is suspended from it. Six similar springs are used in the system shown in figure.Determine the total extension.
Date posted: September 12, 2019. Answers (1)