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- A drop of oil has a volume of 3.0 x 10-6m3 and spreads to form a patch of radius 16cm on the surface of water. Determine the...(Solved)
A drop of oil has a volume of 3.0 x 10-6m3 and spreads to form a patch of radius 16cm on the surface of water. Determine the thickness of the oil patch.
Date posted: September 26, 2019. Answers (1)
- The figure below shows a homogenious wooden sphere with a nail driven or hammered into it at a point x as shown below.(Solved)
The figure below shows a homogenious wooden sphere with a nail driven or hammered into it at a point x as shown below.
The sphere is allowed to roll after a little push on it. On what position will it settle along the plane PQ.Give a reason for your answer.
Date posted: September 26, 2019. Answers (1)
- State one limitation of the gas law.(Solved)
State one limitation of the gas law.
Date posted: September 26, 2019. Answers (1)
- Explain why a dead dog thrown next to school smells so much during the day than during cold morning.(Solved)
Explain why a dead dog thrown next to school smells so much during the day than during cold morning.
Date posted: September 26, 2019. Answers (1)
- The micromer scewguage shown had an error of – 0.03mm and was used to measure the diameter of a ball bearing.(Solved)
The micromer scewguage shown had an error of – 0.03mm and was used to measure the diameter of a ball bearing.
Find the radius of the ball bearing whose diameter is recorded by the instrument.
Date posted: September 26, 2019. Answers (1)
- The diagram below show a battery of e.m.f 12V and an internal resistance of 0.17O connected to a combination of resistors.(Solved)
The diagram below show a battery of e.m.f 12V and an internal resistance of 0.17Ω connected to a combination of resistors.
Calculate
i). The current through the 3.0Ω resistor.
ii). The potential difference across the parallel connection.
iii). The current through the 4Ω resistor.
Date posted: September 26, 2019. Answers (1)
- A compound microscope with an objective lens Lo of focal length 1.2cm and an eye piece lens Le of focal length 2.8cm. An object is...(Solved)
A compound microscope with an objective lens Lo of focal length 1.2cm and an eye piece lens Le of focal length 2.8cm. An object is placed 1.8cm from the objective lens. The system of lenses produces a final image a distance of 12.0cm from Le. Determine the distance of separation of lens Lo and Le.
Date posted: September 26, 2019. Answers (1)
- Study the diagram below and answer the following questions.(Solved)
Study the diagram below and answer the following questions.
Calculate the current flowing through the 2Ω resistor.
Calculate the voltage drop across the 3Ω resistor.
Date posted: September 26, 2019. Answers (1)
- Sketch the circuit symbol of a semiconductor diode and name its parts.(Solved)
Sketch the circuit symbol of a semiconductor diode and name its parts.
Date posted: September 26, 2019. Answers (1)
- A radioactive source, aluminum plate and a suitable detector were arranged as shown below.(Solved)
A radioactive source, aluminum plate and a suitable detector were arranged as shown below.
Before the source was introduced, the detector registered a reading of 40 counts per second. Explain this observation.
Date posted: September 26, 2019. Answers (1)
- A 10µF capacitor is charged by a 100 V supply and then connected a cross an uncharged 20µF capacitor. Calculate the final p.d on each...(Solved)
A 10μF capacitor is charged by a 100 V supply and then connected a cross an uncharged 20μF capacitor. Calculate the final p.d on each capacitor.
Date posted: September 26, 2019. Answers (1)
- The figure below shows a wire carrying current placed over a magnetic compass. On the wire, indicate the direction of electric current. The shaded side...(Solved)
The figure below shows a wire carrying current placed over a magnetic compass. On the wire, indicate the direction of electric current. The shaded side is the North Pole.
Date posted: September 26, 2019. Answers (1)
- Two similar razor blades are placed one on a wooden block and the other on a soft iron block as shown in the figure below(Solved)
Two similar razor blades are placed one on a wooden block and the other on a soft iron block as shown in the figure below
It was observed that the razor blade on the wooden block was attracted to the magnet while the other on the soft iron block was not. Explain.
Date posted: September 26, 2019. Answers (1)
- What property of cathode rays shows that they are particles and not waves?(Solved)
What property of cathode rays shows that they are particles and not waves?
Date posted: September 26, 2019. Answers (1)
- The figure below shows an electric circuit with three diodes, three bulbs and a cell. State and explain what would be observed when the switch...(Solved)
The figure below shows an electric circuit with three diodes, three bulbs and a cell. State and explain what would be observed when the switch is closed.
Date posted: September 26, 2019. Answers (1)
- A radio signal of 30MHz is received by an aerial whose length is 0.125 of its wavelength. If the speed of light is 3.0x108 m/s...(Solved)
A radio signal of 30MHz is received by an aerial whose length is 0.125 of its wavelength. If the speed of light is 3.0x108 m/s determine the length of the aerial.
Date posted: September 26, 2019. Answers (1)
- The figure below shows a thin wire connected to a charge generator and placed close to a candle flame.(Solved)
The figure below shows a thin wire connected to a charge generator and placed close to a candle flame.
Explain why the candle flame is deflected as shown.
Date posted: September 26, 2019. Answers (1)
- Explain why it is dangerous for a bus to carry standing passengers.(Solved)
Explain why it is dangerous for a bus to carry standing passengers.
Date posted: September 26, 2019. Answers (1)
- The diagram below shows a wire loop with two threads tied across it. The loop is dipped into a soap solution such that the soap...(Solved)
The diagram below shows a wire loop with two threads tied across it. The loop is dipped into a soap solution such that the soap film covers it as shown.
Region B is punctured such that the soap film in that section is broken. On the space alongside the diagram sketch the resulting shape of the wire loop. Give a reason for the shape.
Date posted: September 26, 2019. Answers (1)
- A pin is placed at the bottom of the beaker of depth 14.5cm. The beaker is then filled with Kerosene. By using another pin on...(Solved)
A pin is placed at the bottom of the beaker of depth 14.5cm. The beaker is then filled with Kerosene. By using another pin on the side of the beaker and observing from the top, the distance of image of the pin in the beaker is found to be 4.5cm from the bottom.Determine the refractive index of kerosene.
Date posted: September 12, 2019. Answers (1)