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- A pilot fly from P to S through Q and R he distance of Q from P is 820 km on a bearing of 0550...(Solved)
A pilot fly from P to S through Q and R he distance of Q from P is 820 km on a bearing of 0550 .R is 600km on bearing of 3300 from Q while S is on a bearing of 240° a distance of a 1000km
from R.
a) Using a suitable scale draw a diagram representing the routes of the flight
b) On the return journey the pilot flew directly from S to P .What was his direction of flight.
c) How long did the flight in (b) above take If the pilot travelled at 650km/h?
d) If on reaching S the pilot decided to fly directly to Q what would have been his direction of flight and time taken if he flew at 700km/h?
Date posted: August 16, 2019.
- Determine the output voltage for the summing amplifier shown in Fig. 9.5.(Solved)
Determine the output voltage for the summing amplifier shown in Fig. 9.5.
Date posted: August 16, 2019.
- Determine the output voltage for the summing amplifier in Fig. 9.4.(Solved)
Determine the output voltage for the summing amplifier in Fig. 9.4.
Date posted: August 16, 2019.
- The 2nd 7th and 22nd terms of an arithmetic progression are the first three consecutive terms of a geometric progression. The 10th term of the...(Solved)
The 2nd, 7th and 22nd terms of an arithmetic progression are the first three consecutive terms of a geometric progression. The 10th term of the arithmetic progression is 21 Determine:
a) The first term and the common difference of the A.P
b) The sum of the first six terms of the G.P
Date posted: August 16, 2019.
- The diagram below shows some properties of nuclear radiations.(Solved)
The diagram below shows some properties of nuclear radiations.
Identify the radiation represented by letter Q. Give reason.
Date posted: August 16, 2019.
- Show an OP-Amp with Negative Feedback(Solved)
Show an OP-Amp with Negative Feedback
Date posted: August 16, 2019.
- What is the Frequency Response of an OP-Amp?(Solved)
What is the Frequency Response of an OP-Amp?
Date posted: August 16, 2019.
- The table below shows the radioactive decay for a sample of iodine -131.Study it and answer the questions that follow.(Solved)
The table below shows the radioactive decay for a sample of iodine -131.Study it and answer the questions that follow.
(i) Plot the decay curve of iodine -131 using the data given in the table above.
(ii) Use the graph to determine the half-life of the sample.
(iii) What fraction of the original sample remains after 18 days?
Date posted: August 16, 2019.
- The amplifier in Fig. 7.44 is being used to amplify an input signal to a peak output voltage of 100 mV. What is the maximum...(Solved)
The amplifier in Fig. 7.44 is being used to amplify an input signal to a peak output voltage of 100 mV. What is the maximum operating frequency of the amplifier?
Date posted: August 16, 2019.
- Determine the maximum operating frequency for the circuit shown in Fig. 7.44. The slew rate is 0.5 V/µs.(Solved)
Determine the maximum operating frequency for the circuit shown in Fig. 7.44. The slew rate is 0.5 V/μs.
Date posted: August 16, 2019.
- What is the definition of Slew Rate?(Solved)
What is the definition of Slew Rate?
Date posted: August 16, 2019.
- An OP-amp has a gain-bandwidth product of 1.5 MHz. (Solved)
An OP-amp has a gain-bandwidth product of 1.5 MHz. Find the operating bandwidth for the following closed-loop gains (i) ACL = 1 (ii) ACL = 10 (iii) ACL = 100.
Date posted: August 16, 2019.
- An OP-amp has a gain-bandwidth product of 15 MHz. Determine the bandwidth of OP- amp when ACL = 500. Also find the maximum value of...(Solved)
An OP-amp has a gain-bandwidth product of 15 MHz. Determine the bandwidth of OP- amp when ACL = 500. Also find the maximum value of ACL when f2 = 200 kHz.
Date posted: August 16, 2019.
- Explain the Output Voltage from OP-Amp(Solved)
Explain the Output Voltage from OP-Amp
Date posted: August 16, 2019.
- A slaughter house bought a number of sheep at sh 1200 each and a number of oxen at sh 15000 each. They paid a total...(Solved)
A slaughter house bought a number of sheep at sh 1200 each and a number of oxen at sh 15000 each. They paid a total amount of sh 135,000.lf they had bought twice as many sheep and three oxen less they would have saved sh 15000.
a) Find the number of each type of animals they bought.
b) The slaughter house sold all the animals at a profit of 30% per sheep and 35% per oxen.Determine the total profit they made.
Date posted: August 16, 2019.
- Study the diagram below and answer the questions that follow.(Solved)
Study the diagram below and answer the questions that follow.
(i) State the observation made in the lime water. Explain.
(ii) How can the identity of substance K be demonstrated?
Date posted: August 16, 2019.
- In an experiment to determine the proportion of oxygen in air, Copper turning were packed in excess in a combustion tube connected to two syringes...(Solved)
In an experiment to determine the proportion of oxygen in air, Copper turning were packed in excess in a combustion tube connected to two syringes of 80 cm3 each in a volume . Syringe R contained 80 cm3 of air while syringe S was closed and empty as shown.
Air was passed over heated turnings slowly and repeatedly until there was no further change in volume. After cooling, 63.2 cm3 of air remained in syringe R.
(i) Why was copper packed in excess?
(ii) State one observation made in the combustion tube during experiment.
(iii) Give an equation for the reaction that took place in combustion tube.
(iv) Determine the percentage of oxygen used up during the experiment.
Date posted: August 16, 2019.
- Form a quadratic equation in t whose roots are - 4 and 7.(Solved)
Form a quadratic equation in t whose roots are - 4 and 7.
Date posted: August 16, 2019.
- In the diagram below, determine vector OW in terms of i, j and k. Given that W divides AB in the ratio
2:3.(Solved)
In the diagram below, determine vector OW in terms of i, j and k. Given that W divides AB in the ratio
2:3.
Date posted: August 16, 2019.
- Every week the number of absentees in a school was recorded. This was done for 39 weeks these observations were tabulated as shown below.Estimate the...(Solved)
Every week the number of absentees in a school was recorded. This was done for 39 weeks these observations were tabulated as shown below.
Estimate the median absentee rate per week in the school
Date posted: August 16, 2019.
- The flow chart below illustrates two industrial processes. Study it and answer the questions that follow.(Solved)
The flow chart below illustrates two industrial processes. Study it and answer the questions that follow.
(a) Name of the process by which air is separated into oxygen and nitrogen.
(b) Identify the substances which are represented by the letters.
A
B
C
D
E
F
(c) (i) Name the catalyst involved in the formation of A and E.
(ii) Explain the role of the catalysts named in (c) above.
(d) (i) Write the chemical equation for the reaction taking place in the absorption tower.
(ii) Why is it not advisable to use hard water to produce sulphuric acid?
(e) (i) What property of concentrated sulphuric acid makes it suitable for the preparation of nitric (v) acid and hydrogen chloride?
(ii) Write chemical equations for the reaction of zinc metal with dilute sulphuric acid and concentrated sulphuric acid.
Dilute sulphuric acid
Concentrated sulphuric acid
Date posted: August 16, 2019.
- A student at a certain college has a 60% chance of passing an examination at the first attempt.Each time a student fails and repeats the...(Solved)
A student at a certain college has a 60% chance of passing an examination at the first attempt.Each time a student fails and repeats the examination his chances of passing are increased by 15% Calculate the probability that a student in the college passes an examination at the second or at the third attempt.
Date posted: August 16, 2019.
- Given that the equation of the normal to the curve y = x2 + 3x +5 at point C is 5y + x =46 find...(Solved)
Given that the equation of the normal to the curve y = x2 + 3x +5 at point C is 5y + x =46 find the coordinates of C.
Date posted: August 16, 2019.
- Show the schematic symbol of an operational amplifier(Solved)
Show the schematic symbol of an operational amplifier
Date posted: August 16, 2019.
- Under a transformation whose matrix T is given below,a figure whose area is 2.5 cm2 is mapped onto a figure whose area is l0 cm2.Find...(Solved)
Under a transformation whose matrix T is given below,a figure whose area is 2.5 cm2 is mapped onto a figure whose area is l0 cm2.Find two possible values of a and hence write down two possible matrices.
Date posted: August 16, 2019.
- The line passing through the point C(-1,3t) and D (t,3) is parallel to the line whose equation is 2y – 3x = 9. Write down...(Solved)
The line passing through the point C(-1,3t) and D (t,3) is parallel to the line whose equation is 2y – 3x = 9. Write down the coordinates of C and D.
Date posted: August 16, 2019.
- Find y if log2y – 2 = log292(Solved)
Find y if log2y – 2 = log292
Date posted: August 16, 2019.
- Solve the equation(Solved)
Solve the equation
Date posted: August 16, 2019.
- Determine the value of subtracting the reciprocal of the expression below from 1.(Solved)
Determine the value of subtracting the reciprocal of the expression below from 1.
Date posted: August 16, 2019.
- In an experiment to separate a mixture of water (100oC) and ethanol (78.4oC), a student set up the apparatus shown below.(Solved)
In an experiment to separate a mixture of water (100oC) and ethanol (78.4oC), a student set up the apparatus shown below.
(a) Identify the mistakes in the set up.
(b) What method would the student use to test the purity of ethanol obtained?
Date posted: August 16, 2019.