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Waves 9-13
Chapters 9-13: Waves, Sound, EM, Color, mirrors, lenses
| Question | Answer |
|---|---|
| All waves carry _____. | Energy |
| Waves that need a medium to transfer energy are called _____. | Mechanical |
| Waves that do not need a medium to travel are _____. What kind of wave? | Electromagnetic, travel in transverse waves |
| The lowest point on a transverse wave is a _____. | trough |
| The highest point on a transverse wave is a _____. | crest |
| Sound waves require a _____ and travel in ____ waves. | medium; compressional/longitudinal |
| The most energetic electromagnetic waves are the _____. | Gamma Rays |
| _____occurs when light waves strike an object and bounce off. | Reflection |
| Energy in a wave is measured by its _____. | Amplitude |
| The speed of sound travels fastest in _____, then in _____, and then in ______. | Solids, liquids, gases |
| If the frequency in a wave doubles, what happens to the wavelength? | gets shorter by half |
| Sounds are produced by _______ particles. | Vibrating |
| Low frequency in an electromagnetic waves means that it has a _______ wavelength. | long |
| The color in the visible light spectrum with the highest frequency is _____. | Purple (Violet) |
| Colors that we can see are _____(Reflected or absorbed). | Reflected |
| What type of material does not allow light to pass through? Give an example. | Opaque, example is a coffee mug |
| What type of material does allow light to pass through? Give an example. | Transparent, wine glass |
| A smooth surface that reflects light to form an image is a _____. | Mirror |
| Light is refracted and spread out by a ____ lens. | Concave |
| Areas of a compressional wave that are spread out are called _____. | Rarefactions |
| Light is refracted and forms a focal point in a _____ lens. Used to correct farsighted vision. | Convex |
| If S=d/t, how long will it take a person to travel a distance of 10km at an average speed of 5 km/hr? | t=d/S so t=2 hr |
| If a=(Vf-Vi)/t, what is the acceleration of a car that speeds up from 30 m/s to 50 m/s in 5 seconds? | (50-30)/5 so a=4m/s2 |
| The _______ is when you or the source of a sound is moving closer and it causes the sound waves to compress and the pitch gets higher. | Doppler Effect |
| If W=F*d, how much work is done when you push a cart 6 meters using 20 Newtons of force? | W=20 * 6, then W=120 Joules |
| If I=V/R, then how much current is flowing in a circuit with a 20-Volt battery and has a resistance of 20 ohms. | I=1 Amp |
| Convert 0.79 meters to centimeters. | 79 centimeters |
| Convert 750 millimeters to meters. | 0.75 meters. |
| If V=frequency*wavelength, then what is the speed of a wave with a frequency of 22 Hz and a wavelength of 65cm? | First, 65 cm equals 0.65m. Then, 22*.65= 14.3 m/s |
Created by:
kbordelon2
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