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- What are the Volt-Ampere Characteristics of pn Junction?(Solved)
What are the Volt-Ampere Characteristics of pn Junction?
Date posted: August 14, 2019.
- A red cow was mated with a white bull. All F1 offspring were neither red nor white.Such individuals are said to be roan.(Solved)
A red cow was mated with a white bull. All F1 offspring were neither red nor white.Such individuals are said to be roan.
(a) Using letter R to represent the gene for red colour and W for the gene for white colour. Work out the genotypes of the F1 offspring.
(b) If the F1 offspring were selfed, state the phenotypic and genotypic ratios of the F2 offspring.
(c) State two importance of using plants in genetics experiments.
Date posted: August 14, 2019.
- Explain the Current Flow in a Forward Biased pn Junction(Solved)
Explain the Current Flow in a Forward Biased pn Junction
Date posted: August 14, 2019.
- Discuss the Properties of PN Junction(Solved)
Discuss the Properties of PN Junction
Date posted: August 14, 2019.
- What is a PN Junction and how is it formed?(Solved)
What is a PN Junction and how is it formed?
Date posted: August 14, 2019.
- Explain the meaning of Majority and Minority Carriers(Solved)
Explain the meaning of Majority and Minority Carriers
Date posted: August 14, 2019.
- The diagram below illustrates the structure in the human eye.
(Solved)
The diagram below illustrates the structure in the human eye.
(i) State one way in which the part labelled c is suited to its functions.
(ii) State the functions of the cells in the part labelled D
(iii) State the changes that occur in part A to facilitate vision of a distance object.
Date posted: August 14, 2019.
- What is the Charge on n-type and p-type Semiconductors?(Solved)
What is the Charge on n-type and p-type Semiconductors?
Date posted: August 14, 2019.
- Explain the N-type and P-type conductivity(Solved)
Explain the N-type and P-type conductivity
Date posted: August 14, 2019.
- Discuss the importance of establishing ECDE centers in kenya?(Solved)
Discuss the importance of establishing ECDE centers in kenya?
Date posted: August 13, 2019.
- A number of industries in Nairobi and Machakos counties have recently been found to direct their effluents into Nairobi River and Athi River respectively. State...(Solved)
A number of industries in Nairobi and Machakos counties have recently been found to direct their effluents into Nairobi River and Athi River respectively. State two effects of each of the following substances present in the industrial effluents.
(a) Lead.
(b) Oils.
Date posted: August 13, 2019.
- Describe the changes that occur in the eye when a person enters a poorly lit room.(Solved)
Describe the changes that occur in the eye when a person enters a poorly lit room.
Date posted: August 13, 2019.
- The angles of a quadrilateral are 3x, 2x, x +14 and 2( x – 7) degrees. Find the smallest angle.(Solved)
The angles of a quadrilateral are 3x, 2x, x +14 and 2( x – 7) degrees. Find the smallest angle.
Date posted: August 13, 2019.
- The figure below shows three circles which intersect with each other externally.If the centres of the circle form a triangle with sides of length 9cm, 7cm and 6cm.Calculate...(Solved)
The figure below shows three circles which intersect with each others externally.
If the centres of the circle form a triangle with sides of length 9cm, 7cm and 6cm.Calculate the radii of the circles.
Date posted: August 13, 2019.
- A circle whose centre (-2,5) passes through point P(10, 10).Find the equation of the circle in the form of ax2 + by2 + cx + dy...(Solved)
A circle whose centre (-2,5) passes through point P(10, 10).Find the equation of the circle in the form of ax2 + by2 + cx + dy + k = 0. Where a,b,c,d and k are constants.
Date posted: August 13, 2019.
- Three quantities t, x and y are such that t varies directly as x and inversely as the square root of y.
Find the percentage decrease...(Solved)
Three quantities t, x and y are such that t varies directly as x and inversely as the square root of y.
Find the percentage decrease in t if x decreases by 44%.
Date posted: August 13, 2019.
- A circle centre o, has the equation x2 + y2 = 4
The area of the circle in the first quadrant is divided into 5 vertical...(Solved)
A circle centre o, has the equation x2 + y2 = 4
The area of the circle in the first quadrant is divided into 5 vertical strips each of width 0.4cm.
a) Use the equation of the circle to complete the table below for values of y correct 2 decimal places.
b) Use the trapezium rule to estimate the area of the circle.
Date posted: August 13, 2019.
- The diagram below shows a mammalian bone. Use it to answer questions that follow.(Solved)
The diagram below shows a mammalian bone. Use it to answer questions that follow.
(a) With a reason, identify the bone.
Identity:
Reason:
(b) Identify each of the parts labelled:
A:
B:
(c) State the function of the part labelled C.
Date posted: August 13, 2019.
- Without using mathematical tables evaluate.(Solved)
Without using mathematical tables evaluate.
Date posted: August 13, 2019.
- Simplify the given expression completely(Solved)
Simplify the given expression completely
![pic13820191725.png](/questions/uploads/pic13820191725.png)
Date posted: August 13, 2019.
- By using the substitution y = 2x, solve the equation.
5 x 22x+1 – 3 x 2x – 34 = 0(Solved)
By using the substitution y = 2x, solve the equation.
5 x 22x+1 – 3 x 2x – 34 = 0
Date posted: August 13, 2019.
- Use logarithms tables to evaluate the expression below.(Solved)
Use logarithms tables to evaluate the expression below.
![pic13820191718.png](/questions/uploads/pic13820191718.png)
Date posted: August 13, 2019.
- Below is a diagram of organism of a particular kingdom.(Solved)
Below is a diagram of organism of a particular kingdom.
(a) Identify the kingdom to which it belongs.
(b) Name the parts labelled:
A:
B:
(c) Other than absorption of food state one main role of structure labelled C.
Date posted: August 13, 2019.
- In the figure below O is the centre of a circle whose radius is 6cm and PQ is 9cm.
a) Calculate angle POQ.
b) Calculate the...(Solved)
In the figure below O is the centre of a circle whose radius is 6cm and PQ is 9cm.
a) Calculate angle POQ.
b) Calculate the area of major segment.
c) Find the area of a triangle ABC with sides 7cm, 9cm and 11 cm long.
Date posted: August 13, 2019.
- The heights (cm) of some seedlings in a nursery are recorded in the table below.
a) Calculate the mean height of seedlings in the nursery.
b)...(Solved)
The heights (cm) of some seedlings in a nursery are recorded in the table below.
a) Calculate the mean height of seedlings in the nursery.
b) Estimate the median height of the seedlings in the nursery.
c) On the grid provided, draw a histogram to represent the information.
Date posted: August 13, 2019.
- In an experiment, some germinating seeds were placed in a large air tight flask and left for 3 days.(Solved)
In an experiment, some germinating seeds were placed in a large air tight flask and left for 3 days. What are the expected changes in composition of air inside the flask?
Date posted: August 13, 2019.
- Triangle ABC has co-ordinates A(2, 0) B (2, 2) and C(0, 2).Using the squared grid provided determine;
a) The co-ordinates of triangle A1B1C1, the image of...(Solved)
Triangle ABC has co-ordinates A(2, 0) B (2, 2) and C(0, 2).Using the squared grid provided determine;
a) The co-ordinates of triangle A1B1C1, the image of triangle ABC under reflection in line x = 0.
b) The co-ordinates of triangle A11B11C11, the image of triangle ABC under rotation of 90o clockwise centre (0, 0).
c) The co-ordinates of triangle A111B111C111, the image of triangle ABC under enlargement centre
(0, 0) scale factor -1.
d) The single transformation which maps triangle A111B111C111 to triangle A1B1C1.
Date posted: August 13, 2019.
- Cylinders of potato tissue were immersed in sucrose solutions differing in their solute potential 24 hours and the percentage change in length determined.The results are...(Solved)
Cylinders of potato tissue were immersed in sucrose solutions differing in their solute potential 24 hours and the percentage change in length determined.The results are shown in the graph below.
(a) With reference to water potential, explain the change in length that occurred when the cylinder potato was immersed in a sucrose solution of solute potential – 600 kPa.
(b) Using the information in the graph, determine the water potential of the potato tissue. Explain your reasoning.
Date posted: August 13, 2019.
- In the figure below (not drawn to scale) OABC is a parallelogram. AB is produced to T such that AB:BT = 3 : 1 and OA...(Solved)
In the figure below (not drawn to scale) OABC is a parallelogram. AB is produced to T such that AB:BT = 3 : 1 and OA is produced to R such that OA : OR = 3 : 5. Given that OA = a and OC = c;
Express in terms of a and c vectors.
a) AC
b) CR
c) AT
d) CT
e) RT
Date posted: August 13, 2019.
- Town Q is 180km on bearing of 050o from town P. Another town R is on a bearing 110o from P and also on compass...(Solved)
Town Q is 180km on bearing of 050o from town P. Another town R is on a bearing 110o from P and also on compass bearing S 30oE from Q. Town S is South of P and also West of R
Using scale 1 cm rep. 20 km;
a) Draw the scale diagram to show the positions of the four towns.
b) Use your scale diagram in (a) above to find;
i) The distance of R from P.
ii) The bearing of Q from S.
iii) The distance of Q from S.
iv) How far P is North of S.
Date posted: August 13, 2019.