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Physics
A Level

Describe and explain the life cycle of a star?

A star begins its life from Hydrogen gas. Gas particles of Hydrogen gas are brought together due to the gravitational force of attraction between them. There is an increase in Kinetic Energy of these gas ...

Answered by Arjun S. Physics tutor
2189 Views

Given a graph of the displacement of a particle, how can you tell if it is in Simple Harmonic Motion?

There are two main features if an object is in SHM. The first is that it has a fixed maximum amplitude. That is to say, if the mean (halfway between the maximum values of oscillation (+ve and -ve)) displa...

Answered by Johnny T. Physics tutor
1900 Views

One of the decays of potassium (A=40, Z=19) results in an excited argon atom with excess energy of 1.50 Mev. In order to be stable, it emits a gamma photon. What frequency and wavelength has this gamma photon?

The nucleus of the atoms are usually in excited states after performing a beta decay. By emitting a photon, the nucleus recover stability. The emitted photon has the same energy as the excess energy of th...

Answered by Marcos S. Physics tutor
2708 Views

What are the similarities and differences between an elastic and an inelastic collision?

In both an elastic and inelastic collision momentum is conserved, however in an elastic collision the total kinetic energy is the same before and after the collision. In an inelastic collision kinetic ene...

Answered by Henry G. Physics tutor
23152 Views

How do stars form?

A star is formed from a nebulae, which is a cloud of dust and gas. The dust and gas particles are drawn together by the gravitational attraction between them. As the nebulae contracts, the dust and gas pa...

Answered by Stephen S. Physics tutor
1683 Views

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