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- The figure below shows two identical balloons A and B the balloons were filled with equal amounts of same type of gas. The balloons are...(Solved)
The figure below shows two identical balloons A and B the balloons were filled with equal amounts of same type of gas. The balloons are suspected at distance X1 and X2 from a metal cube filled with boiling water and placed on an insulating material.
a. State the mode by which heat travels from the cubes to the balloons.
b. The face of the cube towards A is bright and shiny and face towards B is dull black. State with reasons the adjustments that should be made on the distances XI and X2 so that the rate of change of temperature in both balloons remains the same
Date posted: September 27, 2019.
- Give a reason why a person may nose bleed after ascending a high mountain.(Solved)
Give a reason why a person may nose bleed after ascending a high mountain.
Date posted: September 27, 2019.
- Using the ones complement, calculate 3110 - 1710 in binary form.(Solved)
Using the ones complement, calculate 3110 - 1710 in binary form.
Date posted: September 27, 2019.
- The figure below shows water placed in a measuring cylinder calibrated in cm3(Solved)
The figure below shows water placed in a measuring cylinder calibrated in cm3
An object of mass 50.1g and density 16.7 g/cm3 is lowered gently in the water.Calculate the new volume level
Date posted: September 27, 2019.
- Find the sum of the following:(Solved)
Find the sum of the following:
![Q199272019932.png](/questions/uploads/Q199272019932.png)
Date posted: September 27, 2019.
- The figure below shows an arrangement of capacitors to a 12V d.c. supply.(Solved)
The figure below shows an arrangement of capacitors to a 12V d.c. supply.
Determine
(i) Effective capacitance
(ii) Charge across the 8μF capacitor.
Date posted: September 27, 2019.
- Convert the decimal number 0.562510 into its binary equivalent.(Solved)
Convert the decimal number 0.562510 into its binary equivalent.
Date posted: September 27, 2019.
- A new company ABC intends to go into business of desktop publishing.
Advice the company on three computer hardware specification features to consider as a measure...(Solved)
A new company ABC intends to go into business of desktop publishing.
Advice the company on three computer hardware specification features to consider as a measure of enhancing performance.
Date posted: September 27, 2019.
- Describe the following categories of software.
(i) Firmware.
(ii) Proprietary software.(Solved)
Describe the following categories of software.
(i) Firmware.
(ii) Proprietary software.
Date posted: September 27, 2019.
- The figure below shows light passing through a transparent block.(Solved)
The figure below shows light passing through a transparent block.
Determine the refractive index of the block.
Date posted: September 27, 2019.
- Various considerations should be made during input design and output design. State three considerations for each case
(i) Input design.
(ii) Output design.(Solved)
Various considerations should be made during input design and output design. State three considerations for each case
(i) Input design.
(ii) Output design.
Date posted: September 27, 2019.
- State two instances where observation is not viable method of gathering information during system analysis stage(Solved)
State two instances where observation is not viable method of gathering information during system analysis stage
Date posted: September 27, 2019.
- An electric kettle has an element of resistance 28.8 ohms. It is operating from a 240V main supply. Determine its power rating.(Solved)
An electric kettle has an element of resistance 28.8 ohms. It is operating from a 240V main supply. Determine its power rating.
Date posted: September 27, 2019.
- The figure below shows a wave profile for a wave whose frequency is 2.5HZ.(Solved)
The figure below shows a wave profile for a wave whose frequency is 2.5HZ.
Determine the value of t3
Date posted: September 27, 2019.
- A nail is electrically magnetized, it attracts an increasing number of pins as the magnetizing current increase. After some time it can no longer attract...(Solved)
A nail is electrically magnetized, it attracts an increasing number of pins as the magnetizing current increase. After some time it can no longer attract any more pins. Explain this observation domain theory.
Date posted: September 27, 2019.
- A student presented a budget in the form of a worksheet as follows.(Solved)
A student presented a budget in the form of a worksheet as follows.
a) Write a formula to get the total in B6
b) State the expression that would be used to obtain the least expenditure.
Date posted: September 27, 2019.
- A dry cell is not recharged once used up. However when used well, it can serve one for some time. State the precautions necessary when...(Solved)
A dry cell is not recharged once used up. However when used well, it can serve one for some time. State the precautions necessary when using it other than storing it in dry condition.
Date posted: September 27, 2019.
- State three factors that you would consider before replacing or upgrading a computer memory(Solved)
State three factors that you would consider before replacing or upgrading a computer memory
Date posted: September 27, 2019.
- Explain why water kept in a porous pot on a hot day remains cooler than that contained in a metallic vessel.(Solved)
Explain why water kept in a porous pot on a hot day remains cooler than that contained in a metallic vessel.
Date posted: September 27, 2019.
- Mobile phones have becomes common ICT devices. List some of the powerful capabilities that come with some of the latest embedded operating systems in mobile...(Solved)
Mobile phones have becomes common ICT devices. List some of the powerful capabilities that come with some of the latest embedded operating systems in mobile phones.
Date posted: September 27, 2019.
- A stone of mass 4kg is thrown upwards with a kinetic energy of 240J. Neglecting air resistance,calculate the height to which it will rise. (Take...(Solved)
A stone of mass 4kg is thrown upwards with a kinetic energy of 240J. Neglecting air resistance,calculate the height to which it will rise. (Take g = 10N/kg)
Date posted: September 27, 2019.
- The figure below shows a pulley system for lifting heavy objects.(Solved)
The figure below shows a pulley system for lifting heavy objects.
(i) State the velocity ratio of the pulley system.
(ii) If the efficiency of the machine is 75%, calculate the mechanical advantage of the system.
(iii) Determine the effort applied
Date posted: September 27, 2019.
- Convert the following into binary
i) 76CD16
ii) 1238 (Solved)
Convert the following into binary
i) 76CD16
ii) 1238
Date posted: September 27, 2019.
- Define a machine.(Solved)
Define a machine.
Date posted: September 27, 2019.
- List four types as courses in ICT offered at degree level in Kenya.(Solved)
List four types as courses in ICT offered at degree level in Kenya.
Date posted: September 27, 2019.
- State three factors that have led to slow growth of e-learning in Kenyan schools.(Solved)
State three factors that have led to slow growth of e-learning in Kenyan schools.
Date posted: September 27, 2019.
- Explain the difference between ring and star network topology.(Solved)
Explain the difference between ring and star network topology.
Date posted: September 27, 2019.
- Define the following terms
i). Spam mail
ii). Disk(Solved)
Define the following terms
i). Spam mail
ii). Disk
Date posted: September 27, 2019.
- The figure below shows the starting of motion of two arrows 10M above the ground. Both arrows were shot with initial velocity of 20m/s, from...(Solved)
The figure below shows the starting of motion of two arrows 10M above the ground. Both arrows were shot with initial velocity of 20m/s, from one point and at the same instant.
(i) Determine the total height reached by the arrow shot vertically.
(ii) Calculate the time of flight taken by the arrow shot horizontally as it strikes the ground.
(iii) Calculate the horizontal distance covered by the arrow shot horizontally as it strikes the ground.
Date posted: September 26, 2019.
- A turntable of radius 10cm is rotating at 43 revolutions per second. Determine the linear speed of a point on the circumference of the turntable.(Solved)
A turntable of radius 10cm is rotating at 43 revolutions per second. Determine the linear speed of a point on the circumference of the turntable.
Date posted: September 26, 2019.