click below
click below
Normal Size Small Size show me how
Physics
Ch. 1 Test
| Question | Answer |
|---|---|
| Law | a rule of nature that can never change |
| Theory | experimentally proven hypothesis that can change |
| Mass | the amount of matter in an object |
| Weight | the force due to gravity acting on an object |
| Volume | the amount of space occupied by an object in 3d measure |
| Density | mass per unit volume |
| Unit | used to express what measure |
| Variable | used to express measurement |
| Vector | quantity with both magnitude and direction/angle θ-theta |
| Scalar | quantity with magnitude no direction |
| Matter | anything that has mass and takes up space |
| Inertia | an object's resistance to change in motion |
| Accuracy | ability to compare to an accepted value |
| Precision | ability to reproduce a measure |
| Kinetic Theory of Measure | all matter is made up of tiny constantly moving particles |
| Systems of Measure | metric/English= easier to convert- the units must agree |
| Fundamental Measurement Types | length, mass, time |
| (Metric-English) mks-fps | meter, kilo, seconds/ feet, pounds, seconds |
| Base Unit | value of one- tells us what the measurement type is |
| Prefix (before base unit) | multiple of 10- tells us how much of a base unit we have |
| Derived Unit | unit made up two or more numbers |
| Critical Thinking | the process that uses certain skills to solve a problem |
| Graphical Analysis | In science, if we suspect that any two science measures are related, we can determine the exact relationship by graphing, provided we hold a 3rd measure constant |