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| Question | Answer |
| Parallax Errors | Parallax is the apparent motion of objects in front of the eye when the eye position changes. |
| Systematic Errors | These cause readings to be consistently too high or too low when compared with the true value. |
| Random Errors | Caused by experimental factors (Variables) |
| Vernier | is a short auxiliary (secondary) scale which is placed besides the main scale on a measuring instrument. |
| Callipers | is used for measuring the diameter of tubes and other 'convex' bodies. |
| Weight | the weight of an object is the gravitational force acting on it. |
| Mass | The mass of an object is the amount of matter it contains. |
| Density | The mass per unit volume of a given substance. Density=mass/volume |
| Force | A force is a push or a pull;action which tends to change the state of rest/motion of an object. |
| Friction | Frictional forces act so as to slow down motion between moving objects and prevent motion between stationary objects. |
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