The Doppler effect in sound wave
The Doppler effect is a phenomenon observed in waves, including sound waves, where there is a perceived change in frequency or wavelength of a wave d…
O-Levels
Explain, in terms of neutrons, what is meant by controlled nuclear fission
Controlled nuclear fission refers to the process of splitting the nucleus of an atom into smaller parts in a controlled manner. In this context, neut…
Forces and Motion (O-Levels)
Forces and Motion Acceleration: The rate of change of velocity. It can be calculated from the gradient of a velocity-time graph. Balanced Forc…
Astrophysics (O-Levels)
Artificial Satellites: Man-made satellites that have been sent into space for purposes such as satellite imaging and communications. Big Bang The…
Difference between speed and velocity
Speed Velocity The rate of distance travelled is speed The rate of displacement travelled is velocity…