This type of question on volume-temperature graph is common in Science Physics, but strangely, it has not been out for Pure Physics. It is good to understand the graph and also appreciate the unique behaviour of water. View the video for explanation

For sound waves, the information can be represented on three graphs. Namely: Pressure-distance, Displacement-Distance and Displacement-Time graphs. Since sound waves consist of a series of compressions (high pressure) and rarefactions (low pressure), these information can be represented on a pressure-distance graph. For a displacement-distance graph, you can get the (1) amplitude and (2) wavelength of the sound waves. For a displacment-time graph, you can get the (1) amplitud

A transverse wave that you see, e.g. a water wave, can be represented on a displacement-distance(position) graph and a displacement-time graph. The two physical quantities you can determine from the displacement-distance(position) graph are: 1) amplitude, and 2) wavelength The two physical quantities you can determine from the displacement-time graph are: 1) amplitude, and 2) period Displacement-distance graph actually represents the real transverse wave. It shows the particl

Brightness of the filament bulb depends on power. The design of the filament is such that it uses tungsten (high resistivity), coil up (to increase the length) and thin tungsten filament (small cross-sectional area). These features are to let the tungsten filament achieve a certain amount of resistance, so that when current flows through, energy is transferred electrically to the internal (thermal) store of the filament, so that it is hot and the filament glow and gives out l

For Science Physics, you just need to the I-V graphs of ohmic conductor e.g fixed resistor and non-ohmic conductor e.g. filament bulb/lamp. For Pure Physics, all the 4 components are needed.

As the reference height is at B, so above that reference height is considered positive, and below the reference height it is considered negative. Hence the height-time graph is as such. Consider a vertical oscillating object, similar to the simple pendulum, the middle is the fastest.

To get a sharp image on the screen, there are various methods and concepts that you have learned and can be applied here. View the video for the explanation:

There is a related question in Pure Physics 2021 P2 Q9, but slightly different. It asked about why home circuit of 230V is not suitable...

Refer to the video below for the explanation. Related post: Velocity-time graph of ball released from rest with air resistance - Part 1...

Refer to the video below to understand how to sketch the graph. For O-Level, we just need to focus on the general shape. 2024PP Paper 2...