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- What is meant by perfectly inelastic collision.(Solved)
What is meant by perfectly inelastic collision.
Date posted: June 3, 2019. Answers (1)
- The moon goes round the earth at a constant speed. Explain why it is true to say the moon is accelerating.(Solved)
The moon goes round the earth at a constant speed. Explain why it is true to say the moon is accelerating.
Date posted: June 3, 2019. Answers (1)
- A block of metal of mass 150g at 1000C is dropped into a lagged calorimeter of heat capacity 40Jk-1 containing 100g of water at 250C....(Solved)
A block of metal of mass 150g at 1000C is dropped into a lagged calorimeter of heat capacity 40Jk-1 containing 100g of water at 250C. The temperature of the resulting mixture is 340C. (Specific heat capacity of water = 4200Jkgˉ¹).
Determine;
(i) Heat gained by calorimeter.
(ii) Heat gained by water.
(iii) Heat lost by the metal block.
(iv) Specific heat capacity of the metal block.
Date posted: June 3, 2019. Answers (1)
- State the difference between the temperature measured in Kelvin scale and Celsius scale.(Solved)
State the difference between the temperature measured in Kelvin scale and Celsius scale.
Date posted: June 3, 2019. Answers (1)
- A steel cylinder of capacity 0.5m³ contains nitrogen at a pressure of 30,000Pa when the temperature is 270C. What will be the pressure of nitrogen...(Solved)
A steel cylinder of capacity 0.5m³ contains nitrogen at a pressure of 30,000Pa when the temperature is 270C. What will be the pressure of nitrogen if it is allowed to flow into another cylinder of capacity 9.5m³ with the temperature reduced to -230C?
Date posted: June 3, 2019. Answers (1)
- The figure below shows a set-up that may be used to verify pressure law.
(i) State the measurements that should be taken in the experiment.
(ii) Explain...(Solved)
The figure below shows a set-up that may be used to verify pressure law.
![fig353620191036.png](/questions/uploads/fig353620191036.png)
(i) State the measurements that should be taken in the experiment.
(ii) Explain how the measurements in (i) above may be used to verify pressure law.
Date posted: June 3, 2019. Answers (1)
- What is meant by the term “banking” of the road?(Solved)
What is meant by the term “banking” of the road?
Date posted: June 3, 2019. Answers (1)
- When the temperature of a gas in a closed container is raised, the pressure of the gas increases. Explain in terms of kinetic energy how...(Solved)
When the temperature of a gas in a closed container is raised, the pressure of the gas increases. Explain in terms of kinetic energy how the molecules of the gas cause an increase in pressure.
Date posted: June 3, 2019. Answers (1)
- A uniform metre rule pivoted at it’s 15.0cm mark is balanced by a 2N weight suspended at the 5.0cm mark. Determine the mass of the...(Solved)
A uniform metre rule pivoted at it’s 15.0cm mark is balanced by a 2N weight suspended at the 5.0cm mark. Determine the mass of the metre rule.
Date posted: June 3, 2019. Answers (1)
- On the Cartesian plan below sketch a graph to show how the density of water varies from O0C to 100C.(Solved)
On the Cartesian plan below sketch a graph to show how the density of water varies from O0C to 100C.
![fig323620191023.png](/questions/uploads/fig323620191023.png)
Date posted: June 3, 2019. Answers (1)
- Chalk is denser than air. Explain why chalk dust floats in air.(Solved)
Chalk is denser than air. Explain why chalk dust floats in air.
Date posted: June 3, 2019. Answers (1)
- The barometric height in a town is 65cmHg. Given that the standard atmospheric pressure is 76cmHg and the density of mercy is 13600kg/m³, determine the...(Solved)
The barometric height in a town is 65cmHg. Given that the standard atmospheric pressure is 76cmHg and the density of mercy is 13600kg/m³, determine the attitude of the town. (Density of air is 1.25kg/m³).
Date posted: June 3, 2019. Answers (1)
- A burette has an initial reading of 22.5cm³. Determine the final reading after liquid of volume of 11.3cm³. To removal from the burette.(Solved)
A burette has an initial reading of 22.5cm³. Determine the final reading after liquid of volume of 11.3cm³. To removal from the burette.
Date posted: June 3, 2019. Answers (1)
- The Y-gain of a Cathode Ray Oscilloscope (C.R.O.) is set at 5 volts per division. A 20Vd.c. input is applied to the Y-plates and causes...(Solved)
The Y-gain of a Cathode Ray Oscilloscope (C.R.O.) is set at 5 volts per division. A 20Vd.c. input is applied to the Y-plates and causes a deflection of the bright spot on the screen. Show on the screen below the new position of the bright spot.
![fig303620191004.png](/questions/uploads/fig303620191004.png)
Date posted: June 3, 2019. Answers (1)
- Describe how cathode rays are produced in a cathode ray oscilloscope.(Solved)
Describe how cathode rays are produced in a cathode ray oscilloscope.
Date posted: June 3, 2019. Answers (1)
- The cathode ray tube (C.R.T.) of a television uses magnetic fields for the deflection of the cathode rays.
(i) What are cathode rays?
(ii) Explain why...(Solved)
The cathode ray tube (C.R.T.) of a television uses magnetic fields for the deflection of the cathode rays.
(i) What are cathode rays?
(ii) Explain why magnetic fields are preferred to electric fields in a television tube.
Date posted: June 3, 2019. Answers (1)
- A radiation falls on a photosensitive material. State how the following changes affect the emitted photoelectrons:
(i) increase in intensity of incident radiation.
(ii) increase in...(Solved)
A radiation falls on a photosensitive material. State how the following changes affect the emitted photoelectrons:
(i) increase in intensity of incident radiation.
(ii) increase in the frequency of incident radiation.
Date posted: June 3, 2019. Answers (1)
- Plane water wavefronts are incident onto a concave barrier as shown in the figure below.Show on the same diagram the nature of the reflected wavefronts.(Solved)
Plane water wavefronts are incident onto a concave barrier as shown in the figure below.
![fig28362019946.png](/questions/uploads/fig28362019946.png)
Show on the same diagram the nature of the reflected wavefronts.
Date posted: June 3, 2019. Answers (1)
- A vibrator is used to generate water waves in a ripple tank. It is observed that the distance between the first crest and the mid-point...(Solved)
A vibrator is used to generate water waves in a ripple tank. It is observed that the distance between the first crest and the mid-point to the fifth trough is 237.5cm.
The waves travel 224.0cm in 6.0 seconds.
![fig26362019942.png](/questions/uploads/fig26362019942.png)
Determine:
(i) the wavelength of the waves.
(ii) the speed of the waves.
(iii) the frequency of the vibrator.
Date posted: June 3, 2019. Answers (1)
- The figure below shows water wave fronts approaching a boundary between a shallow and a deep region. The
speed of waves in the shallow region is...(Solved)
The figure below shows water wave fronts approaching a boundary between a shallow and a deep region. The
speed of waves in the shallow region is less than in the deep region.
![fig24362019938.png](/questions/uploads/fig24362019938.png)
On the same diagram, complete the figure to show the wavefronts after crossing the boundary.
Date posted: June 3, 2019. Answers (1)