Get premium membership and access questions with answers, video lessons as well as revision papers.
- What is line of flow?(Solved)
What is line of flow?
Date posted: October 12, 2018. Answers (1)
- A girl claps her hands once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 5oC, how long...(Solved)
A girl claps her hands once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 5oC, how long does it take for her to hear the echo?
Date posted: October 12, 2018. Answers (1)
- A boy strikes a railway line (steel) with a hammer. If the speed of sound in steel is 5,200 m/s, determine the time taken for...(Solved)
A boy strikes a railway line (steel) with a hammer. If the speed of sound in steel is 5,200 m/s, determine the time taken for the sound to reach another boy 2.3 km down the railway line with his ear on the rail.
Date posted: October 12, 2018. Answers (1)
- What are the characteristics of sound waves?(Solved)
What are the characteristics of sound waves?
Date posted: October 12, 2018. Answers (1)
- The figure below illustrates part of the displacement-time graph of a wave travelling across water at a particular place with a velocity of 2 ms-1....(Solved)
The figure below illustrates part of the displacement-time graph of a wave travelling across water at a particular place with a velocity of 2 ms-1. Calculate the wave’s; (a) Amplitude (b) Frequency (f) (c) Wavelength
Date posted: October 12, 2018. Answers (1)
- A rope is displaced at a frequency of 3 Hz. If the distance between two successive crests of the wave train is 0.8 m, calculate...(Solved)
A rope is displaced at a frequency of 3 Hz. If the distance between two successive crests of the wave train is 0.8 m, calculate the speed of the waves along the rope.
Date posted: October 12, 2018. Answers (1)
- Outline the characteristics of waves(Solved)
Outline the characteristics of waves
Date posted: October 12, 2018. Answers (1)
- Define transverse and longitudinal pulses and waves giving suitable illustrations(Solved)
Define transverse and longitudinal pulses and waves giving suitable illustrations.
Date posted: October 12, 2018. Answers (1)
- Two identical springs, whose spring constant is 6.0 N/cm, are used to support a load of 60 N as shown below. Determine the extension of...(Solved)
Two identical springs, whose spring constant is 6.0 N/cm, are used to support a load of 60 N as shown below. Determine the extension of each spring.
Date posted: October 12, 2018. Answers (1)
- A body of 200 g was hung from the lower end of a spring which obeys Hooke’s law. Given that the spring extended by...(Solved)
A body of 200 g was hung from the lower end of a spring which obeys Hooke’s law. Given that the spring extended by 100 mm, what is the spring constant for this spring?
Date posted: October 12, 2018. Answers (1)
- A load of 4 N causes a certain copper wire to extend by 1.0 mm. Find the load that will cause a 3.2 mm extension...(Solved)
A load of 4 N causes a certain copper wire to extend by 1.0 mm. Find the load that will cause a 3.2 mm extension on the same wire. (Assume Hooke’s law is obeyed).
Date posted: October 12, 2018. Answers (1)
- If the springs shown below are similar and the constant of proportionality (k) is 100 Nm-1, determine total extension in each arrangement. (Solved)
If the springs shown below are similar and the constant of proportionality (k) is 100 Nm-1, determine total extension in each arrangement.
Date posted: October 12, 2018. Answers (1)
- Applications of the force on a conductor(Solved)
Applications of the force on a current carrying conductor.
Date posted: October 12, 2018. Answers (1)
- State the factors affecting the magnitude of the force on a current carrying conductor(Solved)
State the factors affecting the magnitude of the force on a current carrying conductor
Date posted: October 12, 2018. Answers (1)
- What is an electromagnet?(Solved)
What is an electromagnet?
Date posted: October 12, 2018. Answers (1)
- Magnetic field due to solenoid(Solved)
Magnetic field due to solenoid
Date posted: October 12, 2018. Answers (1)
- Rules for determining the direction of the lines of force(Solved)
Rules for determining the direction of the lines of force.
Date posted: October 12, 2018. Answers (1)
- A vertical object 5 cm high is placed 10 cm in front of a convex mirror of focal length 15 cm. find the position, size...(Solved)
A vertical object 5 cm high is placed 10 cm in front of a convex mirror of focal length 15 cm. find the position, size and nature of image formed. Determine the magnification of the image.
Date posted: October 12, 2018. Answers (1)
- Determine the size, position and nature of the image of an object 5.0 cm tall, placed on the principal axis of a concave mirror of...(Solved)
Determine the size, position and nature of the image of an object 5.0 cm tall, placed on the principal axis of a concave mirror of focal length 15 cm, at a distance 35 cm from the mirror.
Date posted: October 12, 2018. Answers (1)
- State the applications of curved reflectors(Solved)
State the applications of curved reflectors
Date posted: October 12, 2018. Answers (1)