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- The figure below is a simple hydraulic machine used to raise heavy loads.(Solved)
The figure below is a simple hydraulic machine used to raise heavy loads.
Calculate;
(i) The pressure exerted on the oil by the force applied at A
(ii) The load raised at B
(iii) Give two properties which make the oil suitable for use in this machine
Date posted: September 6, 2019.
- A stone of mass 40g is tied to the end of a string 50cm long such that it is 20m above the ground at its...(Solved)
A stone of mass 40g is tied to the end of a string 50cm long such that it is 20m above the ground at its lowest level as shown in the diagram below. It is whirled in a vertical circle at 2rev/s.
(i) If the string breaks at its lowest level as shown, what is the velocity with which it travels?
Calculate the maximum tension in the string.
(ii) Calculate the maximum tension in the string.
(iii) Determine the maximum horizontal distance it travels from the breaking point
Date posted: September 6, 2019.
- Three boats X, y and Z are approaching a harbour H. X is 50km from the harbour on a bearing of 090°.(Solved)
Three boats X, y and Z are approaching a harbour H. X is 50km from the harbour on a bearing of 090°. Y is 80km from the harbour on a bearing of 130° and Z is due West of Y and on a bearing of 200° from the harbour.
(a) Using a scale of 1cm rep 10km make a scale drawing showing the positions of the three boats relative to the harbour.
(b)
(i) Using the scale drawing find; the distance between X and Y.
(ii) The distance of Z from the harbour
(iii) The distance between X and Z.
(iv) The compass bearing of X from Z.
Date posted: September 6, 2019.
- Using Kinetic theory of matter, explain why solids expand when heated.(Solved)
Using Kinetic theory of matter, explain why solids expand when heated.
Date posted: September 6, 2019.
- In the diagram below A is the point (2, 2)(Solved)
(ii) The coordinates of B.
(b) The point C is (9, 1) and CD = 3AB. Find
(i) the coordinates of D.
(c) The point E is (K, 4)
(i) Find in terms of K, the vector AE.
(ii) Give that AED is a straight line, find K.
Date posted: September 6, 2019.
- The figure below shows a machine being used to raise a load.Determine the efficiency of the machine.(Solved)
The figure below shows a machine being used to raise a load.Determine the efficiency of the machine.
Date posted: September 6, 2019.
- Determine the values of x where the curve y = x² - 2x - 3(Solved)
(a) Determine the values of x where the curve y = x² - 2x - 3 cuts the x-axis.
(b) Using the mid-ordinate rule with four ordinates, estimate the area enclosed by the curve
y = x² - 2x - 3 and the x-axis
(c) Calculate the same area using integration method.
(d) Taking the area obtained by integration to be the exact area of the region, calculate the percentage error made when the mid-ordinate rule is used.
Date posted: September 6, 2019.
- The table below gives some physical properties of substances A, B and C. Study it and answer the questions that follow.(Solved)
The table below gives some physical properties of substances A, B and C. Study it and answer the questions that follow.
Identify the substance that is:
(i) Giant atomic structure
(ii) Ionic structure
Date posted: September 6, 2019.
- The diagram below shows a braking system.Why is the master piston, made smaller than the slave piston?(Solved)
The diagram below shows a braking system.Why is the master piston, made smaller than the slave piston?
Date posted: September 6, 2019.
- The diagram below shows a uniform 5m long metal rod of mass 800g. It is suspended by a string tied at a point 3.5m from...(Solved)
The diagram below shows a uniform 5m long metal rod of mass 800g. It is suspended by a string tied at a point 3.5m from one end. Determine the load which should be hung at point X to keep the plank horizontal.
Date posted: September 6, 2019.
- A tube of radius 9 mm has a constriction of diameter 10mm. Water flows in the tube at 3m/s. Determine the velocity of water in...(Solved)
A tube of radius 9 mm has a constriction of diameter 10mm. Water flows in the tube at 3m/s. Determine the velocity of water in the constriction.
Date posted: September 6, 2019.
- The diagram below shows a micrometer screw gauge. What is the reading in SI units?(Solved)
The diagram below shows a micrometer screw gauge. What is the reading in SI units?
Date posted: September 6, 2019.
- Use the information below to answer the questions that follow:-(Solved)
Use the information below to answer the questions that follow:-
Calculate the molar enthalpy of combustion of ethanol. Given that:
C(s)H2OH(1) + 3O2(g) → 2CO2(g) + 3H2O(1)
Date posted: September 6, 2019.
- Fill the blank spaces with the correct form of the word provided in brackets.(Solved)
Fill the blank spaces with the correct form of the word provided in brackets.
1.Mr Das should be taught manners, he was .................(opinion)
2. We must provide.................improvements in health services. (demonstrate)
3. KCSE ............... have been completed. (analysis)
4. The drama club patron wanted a written .................from the students following there misconduct during the festivals (apologize)
5. Your explanation is based on too many......... (presume)
6. Mary is the most ..............(quarrel) of three students.
7. The .......of the matter brought the District Commissioner to their village. (grave)
8. Jona’s .........in drugs affected his performance. (Indulge)
9. ODM and wiper parties have formed an....................(ally)
10. The..........of the road made driving difficult (even).
11. Sports persons need to arrive in camp two days early in order to................................ (climate)
12. Pope Francis I took over the ...................................after Pope Benedict XVI resigned. (Pope)
13. No single female candidate won the ...................seat in the just concluded election. (Governor)
14. The government has lost all.............. following the increasing cases of corruption in high places. (credible)
15. The company was running ..............(profit)
16. Those..............are magnificent. (stadium)
17. His...........................Was expected. (deny)
18. Mrs. Wafula and Mrs. Kamau...................setting the exam in the library. (Fill in the blank with the correct form of the verb ‘be’)
Date posted: September 6, 2019.
- A cell supplies a current of 0.5A when connected to a 2 ohms resistor and 0.25A when connected to a 5 ohms resistor. Find the...(Solved)
A cell supplies a current of 0.5A when connected to a 2 ohms resistor and 0.25A when connected to a 5 ohms resistor. Find the e.m.f and the internal resistance of the cell.
Date posted: September 6, 2019.
- Change the following into reported speeches.(Solved)
Change the following into reported speeches.
i. "Will you come with us to the market?" She asked.
ii. "Consider the consequences of your behavior," the principal advised the students.
iii. "I don’t share your views on politics," he said.
iv. "I must sign the cheques now," the manager said.
vi. "I get up at 5.00am every morning," said John.
vii. "Run to church," Lukoko told Njuru, "and ask the priest to come now."
Date posted: September 6, 2019.
- The figure shows three resistors as shown.If the voltmeter reads 4V, find the(Solved)
The figure shows three resistors as shown.If the voltmeter reads 4V, find the
(i) Effective resistance
(ii) Current through the 3 ohms resistor
(iii) Potential difference across the 8 ohms resistor.
Date posted: September 6, 2019.
- In the industrial extraction of lead metal, the ore is first roasted in a furnace. The solid mixture obtained is then fed into another furnace...(Solved)
In the industrial extraction of lead metal, the ore is first roasted in a furnace. The solid mixture obtained is then fed into another furnace together with coke limestone and scrape iron. State the functions of each of the following in this process:-
(a) Coke
(b) Scrape iron
(c) Limestone
Date posted: September 6, 2019.
- Change into active voice(Solved)
Change into active voice
Kenyan oil was used by the colonialists in the manufacture of candles.
Date posted: September 6, 2019.
- Change the following sentences into passive voice(Solved)
Change the following sentences into passive voice
i. Who stole Jane’s book?
ii. People say this new material is very good.
iii. Nobody did the work.
iv. Mary has been writing a composition.
v. The cook has been preparing food.
Date posted: September 6, 2019.
- Change the following sentences into passive voice.(Solved)
Change the following sentences into passive voice.
i.If you have not talked to the principal, he will send the students home.
ii. Kwamboka’s mother had made the delicious meal.
iii. The organization bore the burden.
iv. The trainee pilot flew the plane.
v. Tom is riding the bicycle.
vi. The supervisor tells candidates the regulations at the beginning of the exam.
vii. He gave her the expensive watch.
Date posted: September 6, 2019.
- Rewrite the following sentences according to the instructions given. Do not change the meaning.(Solved)
Rewrite the following sentences according to the instructions given. Do not change the meaning.
1.The photographs will be taken at the venue of the wedding. The photographs will be taken in a reputable studio. (Combine into once sentence using 'either .......or........')
2. The adventure I had was exciting. (End with ‘adventure’)
3. There are very few boys in our class. (Rewrite using ‘any’)
4. Karendi is the …………… of the twins. (Use ‘pretty’ in its correct form)
5. Lilian Gilbreth invented the step-on garbage can. Her children wrote about her life. (Join into one sentence using whose)
6. Is this the only blue car in your showroom? (Begin: Aren’t…)
7. Omondi is a weak student. He can hardly write meaningfully. (Rewrite as one sentence using, 'such.........)
Date posted: September 6, 2019.
- Define electric resistance.(Solved)
Define electric resistance.
Date posted: September 6, 2019.
- Light of frequency 5.50 x 1014 Hz is incident on a surface whose work function is 2.5ev.
(i) Determine the energy of photons of light in...(Solved)
Light of frequency 5.50 x 1014 Hz is incident on a surface whose work function is 2.5ev.
(i) Determine the energy of photons of light in eV. (Take h = 6.63 x 10-34 Js) and 1eV
(ii) Will photoelectric emission occur? Explain
Date posted: September 6, 2019.
- Rewrite the following sentences according to the instructions given. Do not change the meaning.
(Solved)
Rewrite the following sentences according to the instructions given. Do not change the meaning.
1. Peter does not have any money. (Change into affirmative form)
2.Canadian goose are creating crisis south of their usual range. (replace the underlined words with their plurals)
3. Is there life after death? This is a question which man has been asking himself for a very long time. (Rewrite beginning: The question of.......... Do not use the word question twice).
4.I don’t think you should go out this afternoon. (Rewrite beginning: I’d rather...........)
5.After a new principal was appointed, results began to improve. (Rewrite beginning: Subsequent.............)
6.You should not walk out of the house at night under any circumstances. (Begin: Under no circumstances....)
7.My examination results were released only after I had cleared the fee balance. (Begin: Not until......)
8.Apart from those two, everyone else is disciplined. (Rewrite beginning: Save:................ )
9. Wambui is a Kenyan student who is 16 years old. (Rewrite to end in .................Student.
10.My certificate was released only after I had cleared the balance. (Begin: Not until................)
Date posted: September 6, 2019.
- The figure below shows photocell used in a set-up for a burglar alarm.(Solved)
The figure below shows photocell used in a set-up for a burglar alarm.
(i) Give a reason why the photocell is usually evacuated.
(ii) State the function of the resistor R in this circuit
(iii) Explain why a particular radiation such as ultra-violet light is used to strike a given cathode surface.
(iv) Explain how the set-up in the figure can be used as a burglar alarm.
Date posted: September 6, 2019.
- The figure below illustrates a method of charging a metal sphere.(Solved)
The figure below illustrates a method of charging a metal sphere.
(i) Name the method of charging shown in the figure.
(ii) Indicate the final charge on the sphere in the figure.
Date posted: September 6, 2019.
- In an experiment to investigate factors affecting capacitance of a capacitor, a student increased the area of the plates and decreased the separation of the...(Solved)
In an experiment to investigate factors affecting capacitance of a capacitor, a student increased the area of the plates and decreased the separation of the plates. Explain the effect on the capacitance when
(i) the area of plates increased
(ii) the distance of the separation of the plates decreased
Date posted: September 6, 2019.
- A converging lens forms an image which is three times the object. Determine the focal length of the lens if the distance between the object...(Solved)
A converging lens forms an image which is three times the object. Determine the focal length of the lens if the distance between the object and the screen is 80cm.
Date posted: September 6, 2019.
- (a) State why it's necessary to dry the hydrogen gas before igniting it.
(i) State the precaution that must be taken before igniting the hydrogen.(Solved)
(a) State why it's necessary to dry the hydrogen gas before igniting it.
(i) State the precaution that must be taken before igniting the hydrogen.
Date posted: September 6, 2019.