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- The figure below shows part of the lighting circuit of a house.(Solved)
The figure below shows part of the lighting circuit of a house.
i) Explain why a fuse is included in the circuit.
ii) Explain why the fuse is placed in the live wire rather than in the neutral wire.
iii) Each lamp has a power of 60 W. Calculate the current through one lamp when it is switched on.
Date posted: September 12, 2019.
- List two disadvantages of small scale farming. (Solved)
List two disadvantages of small scale farming.
Date posted: September 12, 2019.
- The figure below shows a section of a flexible wire carrying current perpendicularly out of the paper.The wire moves in the direction shown as current...(Solved)
The figure below shows a section of a flexible wire carrying current perpendicularly out of the paper.The wire moves in the direction shown as current passes through it.
i) Label the polarities of the magnets A and B.
ii) Explain the behaviour of the flexible wire.
Date posted: September 12, 2019.
- Using well labeled diagrams, explain how each of the following features are formed.
i) Spit
ii) Blow hole(Solved)
Using well labeled diagrams, explain how each of the following features are formed.
i) Spit
ii) Blow hole
Date posted: September 12, 2019.
- The figure below shows a rectangular object of mass 100kg tethered to the sea-bed by a wire. The dimension are 4m ×1.5m × 2m(Solved)
The figure below shows a rectangular object of mass 100kg tethered to the sea-bed by a wire. The dimension are 4m ×1.5m × 2m
Calculate the:
i) Weight of sea water displaced by the buoy (density of sea water = 1100kgm-3)
ii) Upward force exerted on the buoy by the water.
iii) The tension on the string.
Date posted: September 12, 2019.
- List three processes through which coasts are eroded.(Solved)
List three processes through which coasts are eroded.
Date posted: September 12, 2019.
- The diagram below shows two parallel mirrors M1 and M2 and a ray of light being incident on one of the mirrors as shown. Trace...(Solved)
The diagram below shows two parallel mirrors M1 and M2 and a ray of light being incident on one of the mirrors as shown. Trace the ray of light through the mirrors.
Date posted: September 12, 2019.
- Name three places in East Africa where glaciers are found.(Solved)
Name three places in East Africa where glaciers are found.
Date posted: September 12, 2019.
- State the unit specific latent heat of a substance.(Solved)
State the unit specific latent heat of a substance.
Date posted: September 12, 2019.
- Explain how the following factors influence climate.
i) Latitude
ii) Altitude
iii) Aspect
iv) Winds(Solved)
Explain how the following factors influence climate.
i) Latitude
ii) Altitude
iii) Aspect
iv) Winds
Date posted: September 12, 2019.
- 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.
- You intend to carry out a field study of the land forms around your school.
i) State three objectives of your study.
ii) State three methods...(Solved)
You intend to carry out a field study of the land forms around your school.
i) State three objectives of your study.
ii) State three methods you would use to record the information you would collect
Date posted: September 12, 2019.
- The following results were obtained during an experiment to determine the solubility of potassium nitrate in water at 300C.
Mass of dish = 15.86g, mass of...(Solved)
The following results were obtained during an experiment to determine the solubility of potassium nitrate in water at 300C.
Mass of dish = 15.86g, mass of dish + saturated solution at 300C= 26.86g, mass of dish + solid KNO3 after evaporation to dryness = 16.7g. Calculate the mass of saturated solution containing 60.0g of water at 300C.
Date posted: September 12, 2019.
- 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.
- Give the two dates of equinoxes.(Solved)
Give the two dates of equinoxes.
Date posted: September 12, 2019.
- 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.
- Give the name of the following organic compounds.(Solved)
Give the name of the following organic compounds.
Date posted: September 12, 2019.
- List four characteristics of desert soils.(Solved)
List four characteristics of desert soils.
Date posted: September 12, 2019.
- If the local time in Nairobi on longitude 37 degree E is 10.00 a.m. What will the time be at Buchanan Liberian on longitude 10...(Solved)
If the local time in Nairobi on longitude 37 degrees E is 10.00 a.m. What will the time be at Buchanan Liberian on longitude 10 degrees W?
Date posted: September 12, 2019.
- Below is a scheme of some reactions starting with but-z-yne. Study it and answer the questions that follow.(Solved)
Below is a scheme of some reactions starting with but-z-yne.
Study it and answer the questions that follow.
(a) Name Y, X and T
Date posted: September 12, 2019.
- The diagram below represents part of the earth’s crust which has been subjected to tension forces.(Solved)
The diagram below represents part of the earth’s crust which has been subjected to tension forces.
a)
i) Name the slope marked A.
ii) Name the angle marked B.
b) State three ways in which faulting can influence drainage systems.
Date posted: September 12, 2019.
- Name three products transported by pipeline.(Solved)
Name three products transported by pipeline.
Date posted: September 12, 2019.
- Geography students from Igoji went for a field study at Mumias sugar factory.
i) Identify two methods they used to collect data
ii) Explain three problems...(Solved)
Geography students from Igoji went for a field study at Mumias sugar factory.
i) Identify two methods they used to collect data
ii) Explain three problems they identified facing sugar-cane farmers in Kenya.
Date posted: September 12, 2019.
- Explain three problems that Kenya face as a result of over dependence on petroleum(Solved)
Explain three problems that Kenya face as a result of over dependence on petroleum
Date posted: September 12, 2019.
- What is an amphoteric oxide?(Solved)
What is an amphoteric oxide?
Date posted: September 12, 2019.
- The table below shows some of Kenya’s imports and exports in 1987. Use it to answer question (a) and (b).(Solved)
The table below shows some of Kenya’s imports and exports in 1987. Use it to answer question (a) and (b).
a) i) Using a radius of 4cm, draw a piechart to represent the data of imports shown by the table above.
ii) State three advantages of using pie charts to represent statistical data.
b) Explain why Kenya imports sugar and wheat yet she is a producer of the same commodities.
c) Explain four factors that influence importation and exportation of goods into and out of Kenya.
Date posted: September 12, 2019.
- Explain why chlorine is a gas while iodine is a solid at room temperature.(Solved)
Explain why chlorine is a gas while iodine is a solid at room temperature.
Date posted: September 12, 2019.
- Distinguish between threshold frequency and threshold wavelength.(Solved)
Distinguish between threshold frequency and threshold wavelength.
Date posted: September 12, 2019.
- Two towns A and B lie on the same latitude in the northern hemisphere. When it is 8:00 am At A, the time at B...(Solved)
Two towns A and B lie on the same latitude in the northern hemisphere. When it is 8:00 am At A, the time at B is 11:00 a.m.
a) Given that the longitude of A is 150 E, find the longitude of B.
b) A plane leaves A for B and takes 3 ½ hours to arrive at B traveling along a parallel of latitude at 850 km/h. Find:
i) The radius of the circle of latitude on which town A and B lie.
ii) The latitude of the two towns. ( Take radius of the earth to be 6371km).
Date posted: September 12, 2019.
- Give equations to show the reactions that take place when;
(a) iron reacts with steam.
(b) Give one industrial use of the gas produced in the...(Solved)
Give equations to show the reactions that take place when;
(a) iron reacts with steam.
(b) Give one industrial use of the gas produced in the reactions in (a) above.
Date posted: September 12, 2019.