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RAD 156 Week 1
Part 1
| Question | Answer |
|---|---|
| What Day were X-Rays discovered on? | November 8, 1895 |
| Who Discovered X-Rays? | Dr. Wilhelm Conrad RΓΆentgen |
| Vacuum tube that produces an electron stream | Cathode Ray Tube |
| The first X-Ray was taken on? | December 22, 1895 |
| The first X-Ray was an image of | Wilhelm RΓΆentgen's wife's hand |
| The First X-Ray machines had long exposures that lasted from | 30 Minutes- 2 Hours |
| X-rays cause damage via | Ionizing Radiation |
| 3 Fundamental Quantities- Mass | Quantity of matter that is NOT equal to weight!! |
| _______ does not change with form | Mass |
| 6 Derived Quantities- Velocity | Rate of change of an objectβs position (speed) |
| 6 Derived Quantities- Acceleration | Rate of change of Velocity |
| 6 Derived Quantities- Force | Action that changes the motion of an object |
| 6 Derived Quantities- Momentum | Quantity of motion of an object (how difficult it would be to stop it or change its direction) |
| 6 Derived Quantities- Work | Transfer of energy when force causes an object to move |
| 6 Derived Quantities- Power | Rate of work, rate of energy transfer |
| What are the units of Force? | Newton |
| What are the units of Velocity? | Meters Per Second (m/s) |
| What are the units of Acceleration | Meters Per Second Squared (m/s2) |
| What are the units of Momentum? | kg-m/s |
| What are the units of Work? | Joule = (kg-m2/s2) |
| What are the units of Power? | Watt |
| Resistance to change in velocity Based strictly on mass | Inertia |
| Newton's First Law- | A body will remain at rest or will continue to move with constant velocity in a straight line unless acted on by an external force (law of inertia) |
| Newton's Second Law- | The force (F) that acts on an object is equal to the mass (m) of the object multiplied by the acceleration (a) produced (Law of force) |
| Newton's Third Law- | For every action, there is an equal and opposite reaction (Law of Action/reaction) |
| _____ is the Ability to do work | Energy |
| Potential Energy- | Stored energy, based on position or configuration |
| Kinetic Energy- | Energy associated with the motion of an object |
| X-Rays _______ because they always diverge | Cannot Be Focused |
| Why cant X-Rays be focused? | Because they Always Diverge |
| _________ restricts or limits exposure by absorbing part of the beam | Collimation |
| Collimation________ focus x-rays | Does Not |
| Velocity Formula | π= π /π |
| Acceleration Formula | π=((π_π β π_π ))/π |
| Force Formula | πΉ=ππ |
| Momentum Formula | π=ππ£ |
| Work Formula | π€=πΉπ |
| Power Formula | π=π€/π‘ |
| Rate of motion is known as? | Velocity |
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