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What is damping in Simple Harmonic Motion?

An oscillation is damped if resistive forces are present e.g. air resistance or friction. The amplitude of the system will decrease over time, as opposed to a free oscillation which is undamped (no resistive...
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Answered by Chris D. • Physics tutor
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Explain the Principle of Moments.

The moment of a force about any point is defined as the force x perpendicular distance from the line of action of the force to the point - moment = F x d the unit is Nm. Principle of moments states that for ...
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Answered by Chris D. • Maths tutor
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What is the difference between a scalar and vector quantity?

Scalars have a magnitude (size) only. Vectors have both magnitude and direction.
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Answered by Chris D. • Maths tutor
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What is the definition of the photoelectric effect?

The photoelectric effect is the emission of electrons from the surface of a metal due to exposure of electromagnetic radiation above a certain frequency. Photon energy (E=hf or E=hc/λ). The work function is ...
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Answered by Chris D. • Physics tutor
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Explain the process of annihilation?

Matter and antimatter will annihilate if they meet: 1) Particle meets antiparticle. 2) Both have rest energies due to their masses. 3) Both have kinetic energies due to their movement (if they are moving). 4...
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Answered by Chris D. • Physics tutor
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