The wavelength of waves produced on the surface of water is 20 cm. If the wave velocity is 24 m/s, calculate:
i) State the purpose of a fuse in an electric circuit. Name the material used for making a fuse wire.
ii) Mention two factors on which the internal resistance of a cell depends.
Draw a labelled diagram to show the various components of a step-down transformer.
The labeled diagram of a step-down transformer is as shown below:
In winter, the weather forecast for a certain day was ‘severe frost’. A wise farmer watered his fields the night before to prevent frost damage to his crops. Why did he water his fields?
10125 J of heat energy boils off 4.5 g of water at 100oC to steam at 100o C. Find the specific latent heat of steam.
A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20 m/s. Calculate the maximum potential energy it gains as it goes up.