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PHYSICS-1
| Term | Definition |
|---|---|
| Absolute Zero | Is the theoretical temperature at which atoms stop vibrating. All atoms have vibrational energy, even in solids, but if we cool them, they vibrate less. |
| Rate of change in velocity | If a body increases its speed (the result of a force acting on it) then it is said to have positive acceleration. |
| A device for measuring a current | An ammeter is always connected directly into a circuit in series with the components through which the current is flowing. A good ammeter will have virtually no resistance. |
| The unit for an electrical current | amp or A. 1 amp is equal to a flow of 1 coulomb of charge per second. This translates to the formula, amps = coulombs ÷ seconds. |
| Maximum displacement | that an oscillation or wave has from its rest position. A measure of the energy contained in the motion or wave, large amplitude sounds are louder; large amplitude light waves are brighter |
| Astronomical unit | (AU) is defined as the average distance between the Earth and the Sun (approximately 148 million kilometers). |
| Layer of gases | that envelops a planet, moon or other celestial body |
| The building blocks of matter | Once thought to be indivisible particles*, atoms are now understood to consist of electrons*, protons* and neutrons*. |
| A group of electrical cells |
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