| Question | Answer |
|---|---|
| What is force? | Force is a push or a pull that is exerted on an object in order to change the motion of that object. |
| What is work? | Work is a use of force to move an object from the same distance it was at. To find work you do force times distance or power times time. |
| What is a wave? | Waves can be sound waves or light waves or even sound waves. |
| What is a medium? | Medium is material such as solid, liquid and gas that goes into a wave that can travel. |
| What is a crest? | Crest is a point where the waves are the highest. |
| What is a trough? | Trough is a point where the waves are the lowest. |
| What is a longitudinal wave? | Longitudinal wave is particles that move back and forth in the same direction that the waves travel. |
| What is compression? | Compression is a push that travels into the waves. |
| What is a rarefaction? | Rarefaction is the density of something. |
| What is a transverse wave? | Transverse waves is a spring coil that moves up and down as the waves passes. |
| What is a mechanical wave? | Mechanical waves are waves that require a medium. |
| What is a electromagnetic wave? | Electromagnetic wave is a wave that haves light in it such as sunlight. |
| What is amplitude? | Amplitude is a measurement of how far particles in the medium that moves from their resting position. |
| What is a wavelength? | Wavelength is a distance from any point on a wave to the next identical point that is on the same wave. |
| What is frequency? | Frequency is a number of waves that pass a point in a given amount of time. Usually in seconds. |
| What is a hertz (Hz)? | One hertz is equal to one wavelength per a second. |
| What is a wave speed? | Wave speed is the speed that the waves travel. You do work divide by power to get your time. |
| What is power? | Power is the ability to do something or act in a particular way. |
| If 67w of power is produced in 18 seconds, how much work is done? | w=p.t so 67 . 18= 1,206 Joules |
| If a group of kids can apply a force of 1000 newton's to move a box 20 meters, what amount of work did they do? | w= f.d so 1000 n . 20 m= 20,000 Joules. |
| A person weighing 700 N gets on a elevator. The elevator lifts a person 7 m in 10 seconds. How much power was use? | 700 n . 7m = work = 4,900 J than you do w divide by t and you get 490 watts. |
| There are lots of dolphins and they can communicate over a great distance. They use sound with very high frequency (there will be 8 cycles per each second). So if the speed of its sound is at 35 degrees Celsius as 856 m/s. how long will the wave length? | 856 divide by 8 = 107 |
| How do you figure out force? | you do work divide by distance |
| How do you figure out time? | you do work divide by power |
| What is the SI unit for power? | it is watts |
| What is the SI unit for work? | it is Joules |
| Dose sound travel fastest when the air is in warm or in cold? | in warm |
| What is the difference of work and power? | well work is the use of force to make an object move from a certain distance that it was at. Power is how quickly the work is being done. |
