Flashcards
Physics
Flashcards do conjunto (38)
- 1Light carries energy as a what?AS A WAVE.
- 21.Light waves are "what" waves? 2.Sound waves are "what" waves?1. Transverse waves
2. Longitudinal waves - 3An object that gives our lights is described as what?LUMINOUS
- 4An object that doesn't give put lights is what?non-luminous
- 5Which one travels faster? Sound or light?Light.
- 6What are formed when light is blocked?Shadows
- 7Objects that reflect light well have?1. Smooth, shiny surfaces.
2. Usually pale colours
3. Give clear images. - 8Objects that DON'T reflect light well have?1. Have a rough, matt surfaces.
2. Usually dark colours.
3. Doesn't give any images. - 91. In a mirror, what does left appear as and what does right appear as? 2. What is this called?1. Left appears as right and right appears as left.
2.This is called LATERAL INVERSION. - 10Does angle of incidence equal angle of reflection?Yes.
- 11True or false? Light gets reflected from a surface the same angle it hits it.True.
- 12Sound that are reflected is called a what?Echo.
- 13What is refraction?It's when waves speed up or slow down due to travelling in a different medium.
- 14What is a medium?It's something that light waves will travel through.
- 15Long sightedness is caused by?The lens being too thin or the eyeball being too short.
- 16Short sightedness is caused by?The lens being too thick or the eyeball being too long.
- 17What are the primary colours of light?Red, blue and green
- 18What is sound?Sound is a type of energy made when something VIBRATES.
- 19The ........... the amplitude of the wave on the trace, the louder the sound.Larger
- 20The .................... the number of waves across the oscilloscope trace, the higher the frequency and pitch.Greater.
- 21What is frequency?The number of complete vibrations (sound waves) per second.
- 22What is hertz?Frequency is measured in this unit.
- 23What is pitch?This is related to frequency and is described by how high or low the note is.
- 24What is amplitude?1.The amount of energy a sound wave.
2. This shown by the height of the wave and if it is bigger it has more energy. - 25What is pitch?This is related to frequency and is described by how high or low the note is.
- 26What is wavelength?The distance between each complete sound wave.
- 27True or false? The particles in a liquid are closer together than in a gas and a solid.False.
The particles in a solid are closer together than in a liquid and a gas. - 28Particles need to ....... vibrations through material to the ear.carry
- 29What does the outer ear do?The outer ear funnels in the sound.
- 30What does the ear canal do?The sound goes in the ear through the ear canal.
- 31What does the eardrum do?The vibrations from the sound causes your eardrum to vibrate.
- 32What do the ossicles do?The ossicles AMPLIFY the vibration given from the eardrum.
- 33What does cochlea do?The cochlea turns these into electrical signals.
- 34What does the auditory nerves do?They take the signals from the cochlea to the brain.
- 35The range of frequencies a person can hear is called?hearing range.
- 36Sound about 20,000K hertz is called what?ULTRASOUND.
- 37What is the formula to find out speed, time and distance?Speed= Distance divided by time.
Distance= Speed x time.
Time=Distance divided by speed. - 38YEET
Informações
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- Year 8 Physics FlashCards sobre Physics, criado por Angela De Leon em 17-06-2019.
- Criado por
- Angela De Leon
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- Criado por Andrei De Leon · 11 out 2018
- Copiado por Andrei De Leon · 3 jan 2019
- Copiado por Angela De Leon · 8 jun 2019
- Copiado por Angela De Leon · 17 jun 2019
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