Get premium membership and access questions with answers, video lessons as well as revision papers.
- Figure below shows a displacement – time graph of a wave. The velocity of the wave is 50cm/s.(Solved)
Figure below shows a displacement – time graph of a wave. The velocity of the wave is 50cm/s.
Determine the:
(i) Amplitude
(ii) Period
(iii) Wavelength
(iv) Frequency
Date posted: March 26, 2019. Answers (1)
- Some water was put in a burette so that the level read 35.6cm³. 50 drops were then allowed to fall from the burette. The average...(Solved)
Some water was put in a burette so that the level read 35.6cm³. 50 drops were then allowed to fall from the burette. The average volume of one drop was 0.14cm³. What is the new reading of the burette?
Date posted: March 26, 2019. Answers (1)
- Name and explain two types of progressive wave motion(Solved)
Name and explain two types of progressive wave motion
Date posted: March 26, 2019. Answers (1)
- Explain why water curves in a test as shown in the figure below.(Solved)
Explain why water curves in a test as shown in the figure 1 below.
Date posted: March 26, 2019. Answers (1)
- State THREE differences between light waves and sound waves.(Solved)
State THREE differences between light waves and sound waves.
Date posted: March 26, 2019. Answers (1)
- Explain the following terms and state their S.I units
(i) Wavelength
(ii) Amplitude
(iii) Periodic time
(iv) Frequency(Solved)
Explain the following terms and state their S.I units
(i) Wavelength
(ii) Amplitude
(iii) Periodic time
(iv) Frequency
Date posted: March 26, 2019. Answers (1)
- Define the refractive index of a substance(Solved)
Define the refractive index of a substance.
Date posted: March 26, 2019. Answers (1)
- The following reaction is part of reactive series.(Solved)
The following reaction is part of reactive series.
Identify the radiation Q and determine the values of B and C.
Date posted: March 26, 2019. Answers (1)
- A source generates 40 waves in a second. If the wavelength is 8.5 cm. Calculate the time taken to reach a wall 102 m from...(Solved)
A source generates 40 waves in a second. If the wavelength is 8.5 cm. Calculate the time taken to reach a wall 102 m from the source.
Date posted: March 26, 2019. Answers (1)
- State one effect that would be observed when water waves pass from deep to shallow water.(Solved)
State one effect that would be observed when water waves pass from deep to shallow water.
Date posted: March 26, 2019. Answers (1)
- QFM broadcasts at 96.4 MHz, determine the wavelength of the radio broadcast.
(Speed of light, C=3.0×108m/s).
(Solved)
QFM broadcasts at 96.4 MHz, determine the wavelength of the radio broadcast.
(Speed of light, C=3.0×108m/s).
Date posted: March 26, 2019. Answers (1)
- Figure below shows the displacement – time graph for a certain wave(Solved)
Figure below shows the displacement – time graph for a certain wave
Determine the frequency of the wave?
Date posted: March 26, 2019. Answers (1)
- An optical pin 20mm high is placed horizontally on the principal axis of a convex mirror of focal length 6cm as shown in the figure...(Solved)
An optical pin 20mm high is placed horizontally on the principal axis of a convex mirror of focal length 6cm as shown in the figure below.
X is south pole and Y is north pole. Indicate the terminal of A and B on the diagram.
Date posted: March 26, 2019. Answers (1)
- Distinguish between ductile end and brittle material(Solved)
Distinguish between ductile end and brittle material
Date posted: March 26, 2019. Answers (1)
- Two identical springs of spring constant 3N/cm are used to support a load of 30N as shown. Determine the extension of each spring.(Solved)
Two identical springs of spring constant 3N/cm are used to support a load of 30N as shown. Determine the extension of each spring.
Date posted: March 26, 2019. Answers (1)
- An experiment was performed to find out how the length L of a spiral spring varies with the compression force, F. The figure below shows...(Solved)
An experiment was performed to find out how the length L of a spiral spring varies with the compression force, F. The figure below shows the variation.
(i) Draw a diagram of a possible set up of the apparatus
(ii) Over which range of the force does the spring obey Hooker’s law?
(iii) Suggest a reason for the shape of the graph between 40N and 60N
Date posted: March 26, 2019. Answers (1)
- The figure below shows a metallic rod placed in a coil connected to battery terminals A and B.(Solved)
The figure below shows a metallic rod placed in a coil connected to battery terminals A and B.
X is south pole and Y is north pole. Indicate the terminal of A and B on the diagram.
Date posted: March 26, 2019. Answers (1)
- State FOUR reasons why the efficiency of an electric motor is always less than 100%(Solved)
State FOUR reasons why the efficiency of an electric motor is always less than 100%
Date posted: March 26, 2019. Answers (1)
- Figure below shows a D.C electric motor.(Solved)
Figure below shows a D.C electric motor.
(a) Name the parts labeled X1 and X2 and state their functions.
(b) What is the purpose of parts labeled Y1 and Y2?
(c) When the switch k is closed state the forces acting on the sides of the coil and the direction of movement of the coil
(d) What can be done to increase the speed of rotation of the motor?
Date posted: March 26, 2019. Answers (1)
- An un-insulated copper wire XY lies over the fixed wire A and B connected to a battery when the key in the circuit is closed,...(Solved)
An un-insulated copper wire XY lies over the fixed wire A and B connected to a battery when the key in the circuit is closed, the wire XY experiences a force.
(i) In which direction does the wire XY- experience the force?
(ii) How do you determine the direction in (i) above
(iii) When is the force on the wire XY greatest?
(iv) What is the effect of reversing both the magnetic field and direction of flow of current?
(v) State TWO factors by which the force on XY can be decreased
Date posted: March 26, 2019. Answers (1)