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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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What is the Strong Nuclear Force?

The Strong Nuclear Force keeps protons and neutrons together in the nucleus.Its range is no more than about 3-4 fentometres. It has equal effects between a proton-neutron, neutron-neutron and proton-proton c...
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Answered by Chris D. • Physics tutor
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