Subject Answers

The SI unit of momentum is kg m s-1. It can be understood from the equation of momentum itself:Since p = mvTherefore, in terms of units: p (units) = kg ms-1Anot...

When the Newton’s disc rotates, all the colors actually fade to white - and that is a strange occurrence that you don’t expect out of painted patches of color!...

Pumped-storage hydropower (or PSH) uses water as a mode of energy storage, and the type of energy stored is gravitational potential energy. The way it is done i...

A smoke alarm’s function relies on a small amount of radioactive material placed between two electrically charged metal plates. As it releases radiation, it wil...

In this scenario, the two trains approach each other, and then after collision “stick” together. This is an example of inelastic collisions, wherein kinetic ene...

In this scenario, we’re essentially witnessing a change in the internal energy of the water. More specifically it is an increase in kinetic energy we’re talking...

By assuming no heat losses, we are essentially saying that all of the electrical energy supplied to the kettle is equal to the heat energy that has been transmi...

The half-life of a radioactive substance is essentially a measure of the time it takes for a sample to decay to half its original value, whether that be in term...

We know that the energy of a wave particle can be found using the formula:E = hfWhere f = frequency (Hz), E = Energy (J), h = Planck's constantWe also know that...

For a system that is in equilibrium, we know that it has a net moment of zero - in other words:Total clockwise moments = Total anticlockwise momentsIn our given...