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- State the most immediate action to be taken when rescuing a worker found unconscious and still in contact with a live wire.(Solved)
State the most immediate action to be taken when rescuing a worker found unconscious and still in contact with a live wire.
Date posted: September 18, 2019.
- Given the following reagents; solid sodium carbonate, solid lead (II) nitrate, water. Describe how a sample of lead (II) carbonate can be prepared in the...(Solved)
Given the following reagents; solid sodium carbonate, solid lead (II) nitrate, water. Describe how a sample of lead (II) carbonate can be prepared in the laboratory.
Date posted: September 18, 2019.
- A triangle with vertices A ( 1,3) B(2,1) and C (3,1) is mapped onto another triangle with vertices
A1(-3,1), B1 ( -1,2) and C1 (...(Solved)
A triangle with vertices A ( 1,3) B(2,1) and C (3,1) is mapped onto another triangle with vertices
A1(-3,1), B1 ( -1,2) and C1 ( -1,3).
Describe this transformation and find its matrix.
Date posted: September 18, 2019.
- Briefly describe the two types of spreadsheets.(Solved)
Briefly describe the two types of spreadsheets.
Date posted: September 18, 2019.
- A cross between a red forward and white flowered plant produce plants with flowers having red and white patches.(Solved)
A cross between a red forward and white flowered plant produce plants with flowers having red and white patches.
a) What phenomenon is represented by this condition?
b) Work out a cross between the F1 plants.
c) State the phenotypic ratio of F2 plants.
d) State the genotypic ratio of F2 plants.
Date posted: September 18, 2019.
- List two duties performed by each of the following personnel.
(i). Database administrator
(ii). Computer trainer(Solved)
List two duties performed by each of the following personnel.
(i). Database administrator
(ii). Computer trainer
Date posted: September 18, 2019.
- Determine the possible value of x, for which the matrix below is singular. (Solved)
Determine the possible value of x, for which the matrix below is singular.
![fig291892019959.png](/questions/uploads/fig291892019959.png)
Date posted: September 18, 2019.
- Name any two computer related courses that are offered at public universities in Kenya.(Solved)
Name any two computer related courses that are offered at public universities in Kenya.
Date posted: September 18, 2019.
- Robots are introduced in a factory which makes car engines. Mention three ways this could affect the workers.(Solved)
Robots are introduced in a factory which makes car engines. Mention three ways this could affect the workers.
Date posted: September 18, 2019.
- Radioactive polonium - 216 decays as shown below.(Solved)
Radioactive polonium - 216 decays as shown below.
![Q129182019949.png](/questions/uploads/Q129182019949.png)
Date posted: September 18, 2019.
- Convert each of the following numbers:
i. 110.1012 to decimal
ii. 12.687510 to binary
iii. Subtract 110.012 from 11001.01012
iv.Using seven-bit twos compliment, perform the following binary arithmetic leaving...(Solved)
Convert each of the following numbers:
i. 110.1012 to decimal
ii. 12.687510 to binary
iii. Subtract 110.012 from 11001.01012
iv.Using seven-bit twos compliment, perform the following binary arithmetic leaving the answer in binary notation. 11012 - 1001012
Date posted: September 18, 2019.
- Evaluate the area enclosed by the curve y=x3, the x –axis and the lines x=-2 and x =2. (Solved)
Evaluate the area enclosed by the curve y=x3, the x –axis and the lines x=-2 and x =2.
Date posted: September 18, 2019.
- A straight line through the points (4,6) and (2,4) meets the x-axis and y-axis and y –axis at points A and
B respectively. Determine the...(Solved)
A straight line through the points (4,6) and (2,4) meets the x-axis and y-axis and y –axis at points A and
B respectively. Determine the coordinates of points A and B
Date posted: September 18, 2019.
- Study the flowchart below and answer the questions that follow.(Solved)
Study the flowchart below and answer the questions that follow.
(i) State the main type of control structure used in the flowchart.
(ii). Dry run the flowchart and give the expected output.
(iii) What will be the value of product when printed in the following flow chart? Show how you arrive at your answer.
(b). Explain what happens when the expression A = A+1 is changed to A = A-1
c) Give two benefits of structured programming.
Date posted: September 18, 2019.
- Use binomial expansion to expand and simplify (1-3x)6 upto term in x3.
Hence approximate the value of (0.97)6 correct to 4 significant figures. (Solved)
Use binomial expansion to expand and simplify (1-3x)6 upto term in x3.
Hence approximate the value of (0.97)6 correct to 4 significant figures.
Date posted: September 18, 2019.
- Given the following polymer, draw the structure of the monomer.(Solved)
Given the following polymer, draw the structure of the monomer.
![Q89182019937.png](/questions/uploads/Q89182019937.png)
Date posted: September 18, 2019.
- A blood group A mother gave birth to a blood group O child with a blood group B husband.(Solved)
A blood group A mother gave birth to a blood group O child with a blood group B husband.
a) State the genotypes of the parents.
b) What was the genotype of the child?
c) State other blood groups likely to occur in the children of the couple.
Date posted: September 18, 2019.
- Find the centre and radius of the circle of the equation x2 + y2 -6x -8y =0 (Solved)
Find the centre and radius of the circle of the equation x2 + y2 -6x -8y =0
Date posted: September 18, 2019.
- Give the IUPAC names of the following compounds(Solved)
Give the IUPAC names of the following compounds
i) CH3(CH2)OH
ii) CU3CH2CH(CH3)COOH
Date posted: September 18, 2019.
- Name three classes in animals that excrete nitrogenous water in form of uric acid.(Solved)
Name three classes in animals that excrete nitrogenous water in form of uric acid.
Date posted: September 18, 2019.
- Solve the equation given below.
(Solved)
Solve the equation given below.
Date posted: September 18, 2019.
- Study the diagram below.(Solved)
Study the diagram below.
a) Name the parts A, B and C.
b) Name the division to which the organism belong.
c) State two roles of the structure labelled D.
Date posted: September 18, 2019.
- Define the following terms in relation to computer security:
a) Data Encryption
b) Firewall(Solved)
Define the following terms in relation to computer security:
a) Data Encryption
b) Firewall
Date posted: September 18, 2019.
- Name the photoreceptor cells in retina that respond to
(i) Dim light
(ii) Bright light(Solved)
Name the photoreceptor cells in retina that respond to
(i) Dim light
(ii) Bright light
Date posted: September 18, 2019.
- The cross section of a house is in the shape of a pentagon, as shown in the figure below. Determine the
cross-sectional area of the house....(Solved)
The cross section of a house is in the shape of a pentagon, as shown in the figure below. Determine the
cross-sectional area of the house.
![fig211892019927.png](/questions/uploads/fig211892019927.png)
Date posted: September 18, 2019.
- Anne was working on her computer studies project. She was worried of the media to use for storing her data.She settled on a media that...(Solved)
Anne was working on her computer studies project. She was worried of the media to use for storing her data.She settled on a media that used serial file organization.
a) How are files organized on a storage medium using this method?
b) List two advantages offered by this type of file organization
Date posted: September 18, 2019.
- The figure below illustrate specialised cells in an animal.(Solved)
The figure below illustrate specialised cells in an animal.
a) Identify the cells.
b) Name three organs systems where the cells named in (a) above are found.
Date posted: September 18, 2019.
- Two elements X and Y are represented as shown below(Solved)
Two elements X and Y are represented as shown below
17X and 20Y
i) Write the formula of the compound formed when X and Y react.
ii) State the family name to which element X belongs.
iii) Element Y has a mass number of 40, how many neutrons are present in its nucleus?
Date posted: September 18, 2019.
- Find the compound interest on sh. 21000 in 5years at 15% p.a (Solved)
Find the compound interest on sh. 21000 in 5years at 15% p.a
Date posted: September 18, 2019.
- Solve the equation(Solved)
Solve the equation ![fig181892019918.png](/questions/uploads/fig181892019918.png)
Date posted: September 18, 2019.