IB Physics Glossary
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use electric motors with a petrol engine as back-up to provide additional power when necessary. Sophisticated computerized systems switch from the electric motor to the petrol engine and back as required.
occur when the total kinetic energy of a system decreases.
a material that does not allow the flow of electric charge through it.
of a substance is the total potential energy and random kinetic energy of the molecules of the substance. (d)
is radiation composed of particles that individually carry enough energy to liberate an electron from an atom thus ionizing it.
Taken from wikipedia.