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- What is the Critical Frequency of Integrators?(Solved)
What is the Critical Frequency of Integrators?
Date posted: August 16, 2019.
- Find the value of X if(Solved)
Find the value of X if
Date posted: August 16, 2019.
- One interior angle of a certain polygon is 840. If each of the other angles is 1470, how many sides does this polygon have?(Solved)
One interior angle of a certain polygon is 840. If each of the other angles is 1470, how many sides does this polygon have?
Date posted: August 16, 2019.
- Explain the Circuit Analysis and Output voltage of an OP-Amp Integrator(Solved)
Explain the Circuit Analysis and Output voltage of an OP-Amp Integrator
Date posted: August 16, 2019.
- Define OP-Amp Integrators and Differentiators(Solved)
Define OP-Amp Integrators and Differentiators
Date posted: August 16, 2019.
- Two equal circles with centres O and Q and radius 8cm intersect at point A and B as shown below
Given that the distance between O...(Solved)
Two equal circles with centres O and Q and radius 8cm intersect at point A and B as shown below
Given that the distance between O and Q is 12cm and that line AB meets OQ at X, find
(a) the length of chord AB
(b) the area of the shaded region
(c) the reflex angle AOB
Date posted: August 16, 2019.
- The structure below is a polyamide formed from two types of monomers.(Solved)
The structure below is a polyamide formed from two types of monomers.
(i) Give the structural formula of the two monomers forming the polyamide above.
(ii) Name the type of polymerisation.
(iii) Give one use of the polyamide.
Date posted: August 16, 2019.
- Easy coach bus left Nairobi at 8.00am and traveled towards Eldoret at an average speed of 80km/hr.8.00a.m a car left Eldoret towards Nairobi at an...(Solved)
Easy coach bus left Nairobi at 8.00am and traveled towards Eldoret at an average speed of 80km/hr.8.00a.m a car left Eldoret towards Nairobi at an average speed of 120km/h.Given that the distance between Nairobi and Eldoret is 400km.Calculate
(a) the time the car arrived in Nairobi
(b) the time the two vehicles met
(c) the distance from Nairobi to the meeting point
(d) the distance of the bus from Eldoret when the car arrived in Nairobi
Date posted: August 16, 2019.
- Matrix P is given by(a) Find p-1 (b) Two institutes regions and Alphax purchased beans at sh.B per bag and maize at sh.M perbags. Regions...(Solved)
Matrix P is given by
(a) Find p-1
(b) Two institutes regions and Alphax purchased beans at sh.B per bag and maize at sh.M per bag. Regions purchased 8 bags of beans and 14 bags of maize for sh. 47,600. Alphax
purchased 10 bags of beans and 16 bags of maize for sh. 57,400.
(i) form a matrix equation to represent the information above
(ii) Use the matrix p p-1 to find the prices of one bag of each item
(c) The price of bean later went up by 5% and that of maize remain constant. Regions bought the same quality of beans but spent the same total amount of money as before on the two items. State the new ratio of beans and maize.
Date posted: August 16, 2019.
- The table below shows some properties of the organic compounds U, V and W. Use the information to answer questions that follow.(Solved)
The table below shows some properties of the organic compounds U, V and W. Use the information to answer questions that follow.
To which homologous series does each compound belong?
U
V
W
Date posted: August 16, 2019.
- The acceleration of a particle at a time to seconds is given by a=3t2-6tm/s2.When t=1, the velocity of the particle is 6m/s.Find
(a) The equation representing...(Solved)
The acceleration of a particle at a time to seconds is given by a=3t2-6tm/s2.When t=1, the velocity of the particle is 6m/s.Find
(a) The equation representing the velocity of the particle at any time.
(b) (i) the time when the particle attains constant velocity.
(ii) the constant velocity at that time.
(c) The distance traveled by the particle between t=2s and t=6 sec.
Date posted: August 16, 2019.
- The scheme below shows several reactions starting with propanol. Study the scheme and answer the questions which follow.(Solved)
The scheme below shows several reactions starting with propanol. Study the scheme and answer the questions which follow.
(a) (i) Name gas L.
(ii) Name and draw the structural formula of compound K.
(iii) What conditions and reagents are necessary to convert M and N?
Reagents
Conditions
(iv) Write chemical equation for the conversion of K to J.
Date posted: August 16, 2019.
- In a physics test student scored the following marks.
72 50 43 58 62 49 69 60 84 62 55
89 67 92 81 75 63 77...(Solved)
In a physics test student scored the following marks.
72 50 43 58 62 49 69 60 84 62 55
89 67 92 81 75 63 77 95 65 54 35
45 73 41 56 50 36 49 58 61 85
38 64 76 78 51 43 72 37 62 55
(a) Using a class width of 10 and 35-44 as the first class, make a frequency table of the grouped data.
(b) Estimate
(i) the mean
(ii) the median
Date posted: August 16, 2019.
- A bus travels from Nairobi to Kisumu a distance of 320 km at a speed of x km/hr.If the speed is reduced by 20km/hr the...(Solved)
A bus travels from Nairobi to Kisumu a distance of 320 km at a speed of x km/hr.If the speed is reduced by 20km/hr the bus would take 48 minutes more.
(a) Form an equation to represent the given information and simplify it
(b) Find the speed of the bus
(c) Determine the time taken by the bus for the whole journey
(d) Another car is moving from Kisumu to Nairobi at a speed of 80km/h.Determine their relative speed.
Date posted: August 16, 2019.
- Calculate the area of the shaded segment of the circle given in the figure below.(Solved)
Calculate the area of the shaded segment of the circle given in the figure below.
Date posted: August 16, 2019.
- Given that:
Enthalpy of combustion of Carbon (graphite) = -393kJmol-1
Enthalpy of combustion of carbon (II) oxide = -283 kJmol-1(Solved)
Given that:
Enthalpy of combustion of Carbon (graphite) = -393kJmol-1
Enthalpy of combustion of carbon (II) oxide = -283 kJmol-1
(a) Write down the thermo-chemical equations for the combustion of:
(i) Carbon (graphite)
(ii) Carbon (II) oxide
(b) Determine the enthalpy of formation of carbon (II) oxide.
(c) Draw an energy level diagram for the processes in (a) and (b) above.
(d) State two properties of Carbon (IV) Oxide that make it suitable for use in fire extinguishers.
(e) When 8.0 g of sulphur is completely burned in oxygen in a calorimeter, the heat evolved raises the temperature of 500 cm3 of water by 35 0C. Calculate the heat of combustion of sulphur.
(The specific heat capacity of water =
Date posted: August 16, 2019.
- In the figure below, ABCD is a parallelogram. AD is produced to E and BE and CD meet at F.
If angle DEF=250 and angle BFD=700,...(Solved)
In the figure below, ABCD is a parallelogram. AD is produced to E and BE and CD meet at F.
If angle DEF=250 and angle BFD=700, find the size of angle ABF.
Date posted: August 16, 2019.
- The sum of the interior angles of a polygon is 19800.How many triangles can this polygon be
divided into.(Solved)
The sum of the interior angles of a polygon is 19800.How many triangles can this polygon be
divided into.
Date posted: August 16, 2019.
- Solve for x given that:
Log (x-4)+2=log 5+log(2x+10)(Solved)
Solve for x given that:
Log (x-4)+2=log 5+log(2x+10)
Date posted: August 16, 2019.
- Simplify the expression below.(Solved)
Simplify the expression below.
Date posted: August 16, 2019.
- Below is an equation of a straight line.
(i).Find the gradient of the line
(ii) Equation of a line passing through point (2,3) and parallel to...(Solved)
Below is an equation of a straight line.
(i).Find the gradient of the line
(ii) Equation of a line passing through point (2,3) and parallel to the given line
Date posted: August 16, 2019.
- Solve for x in the equation(Solved)
Solve for x in the equation
Date posted: August 16, 2019.
- Give the Applications of Summing Amplifiers(Solved)
Give the Applications of Summing Amplifiers
Date posted: August 16, 2019.
- In Barsumbat mixed secondary school, there are 120 more boys than girls.Half of the boys are two-thirds of the girls are boarders. If there are...(Solved)
In Barsumbat mixed secondary school, there are 120 more boys than girls.Half of the boys are two-thirds of the girls are boarders. If there are 480 boarders, find the total number of students in the school.
Date posted: August 16, 2019.
- Use tables of square ,cubes roots and reciprocals to find the value of x if(Solved)
Use tables of square ,cubes roots and reciprocals to find the value of x if
Date posted: August 16, 2019.
- Explain what Summing Amplifiers are and how it works(Solved)
Explain what Summing Amplifiers are and how it works
Date posted: August 16, 2019.
- Below is radioactive decay series starting from and ending at (Solved)
Below is radioactive decay series starting from and ending at
(i) Identify the radiations emitted at step I and step II.
(ii) Write nuclear equation for reaction which takes place at step III.
(iii) State one way in which radioisotopes poses danger to the environment.
Date posted: August 16, 2019.
- During the year 2001 Samora had 40 more goats than sheep and half as many cows as sheep. In the year 2002 his goats increased...(Solved)
During the year 2001 Samora had 40 more goats than sheep and half as many cows as sheep. In the year 2002 his goats increased by 50%, his cows decreased by 10% and his sheep increased by 20%.At the end of 2002 all his animals were 690.Calculate to the nearest whole number the percentage increase in the number of animals during the year 2002.
Date posted: August 16, 2019.
- Two voltages of + 0.6V and – 1.4 V are applied to the two input resistors of a summing amplifier.(Solved)
Two voltages of + 0.6V and – 1.4 V are applied to the two input resistors of a summing amplifier. The respective input resistors are 400 kilo-ohms and 100 kilo-ohms and feedback resistor is 200 kilo-ohms. Determine the output voltage.
Date posted: August 16, 2019.
- Determine the output voltage for the summing amplifier shown in Fig. 9.6(Solved)
Determine the output voltage for the summing amplifier shown in Fig. 9.6
Date posted: August 16, 2019.