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measurement of sound
measurement of sound

SO 4.1, SO 4.2, SO 4.3 Unit Plan - NESD Curriculum Corner
SO 4.1, SO 4.2, SO 4.3 Unit Plan - NESD Curriculum Corner

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... The pressure at which a liquid will vaporize, or boil, at a given temperature, is called its vapor pressure. This means that boiling occurs whenever the local pressure equals the vapor pressure. Vapor pressure increases with temperature. Note that there are two ways to boil a liquid. One way is to r ...
Physics iGCSE Checklist Jan 2014
Physics iGCSE Checklist Jan 2014

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... 17 Four rods are made from different metals P, Q, R and S. The rods have equal lengths and equal diameters. The rods are heated at one end, in the same way. The table shows the time taken for the temperature at the other end of each rod to rise by 1.0 °C. Which metal is the best conductor of thermal ...
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... The purpose of the ossicles is to amplify the signal as it travels into the inner ear. It works because of a difference in size between the eardrum and the stirrup. The eardrum has a surface area of about 55 square millimeters, but the end of the stirrup that is touching the oval window has a surfac ...
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Year 8 Physics Revision Checklist1.02 MB

... State that white colours reflect heat energy Explain why air is a good insulator Explain why air will not prevent heat transfer via radiation Calculating the speed of an EM wave: A laser (red light) is shone up to a satellite that is orbiting 35786km above the Earth, and the time taken for the laser ...
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... It sets three ossicle bones (malleus, incus, stapes) into motion, changing acoustic energy to mechanical energy. These middle ear bones mechanically amplify sound and compensate mismatched impedance. Inner ear and Central auditory nervous system: When the stapes moves in and out of the oval window o ...
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Types of Ocean waves

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Cross Section Human Ear Model (418k PDF file)

... cause an infection. Water can also infect by washing away an ear’s protective, waxy substance. Moisture in the ear canal attracts bacteria. Dry and shake water from the ears after swimming or showering. ...
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Gas Laws - Holy Family Regional School

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KS4 Waves - Sound 4047KB

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Sound Worksheets

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Waves - Sound - Swinton Community School

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Physics 105 Homework Problems, Fall 2009

17.4 Sound and Hearing
17.4 Sound and Hearing

... In general, sound waves travel fastest in solids, slower in liquids, and slowest in gases. • Particles in a solid tend to be closer together than particles in a liquid or a gas. • The speed of sound depends on many factors, including the density of the medium and how elastic the medium is. ...
17.4 Sound and Hearing
17.4 Sound and Hearing

... In general, sound waves travel fastest in solids, slower in liquids, and slowest in gases. • Particles in a solid tend to be closer together than particles in a liquid or a gas. • The speed of sound depends on many factors, including the density of the medium and how elastic the medium is. ...
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Speed of sound

The speed of sound is the distance travelled per unit time by a sound wave propagating through an elastic medium. The SI unit of the speed of sound is the metre per second (m/s). In dry air at 20 °C, the speed of sound is 343.2 metres per second (1,126 ft/s). This is 1,236 kilometres per hour (768 mph; 667 kn), or a kilometre in 2.914 s or a mile in 4.689 s. The speed of sound in an ideal gas is independent of frequency, but does vary slightly with frequency in a real gas. It is proportional to the square root of the absolute temperature, but is independent of pressure or density for a given ideal gas. Sound speed in air varies slightly with pressure only because air is not quite an ideal gas. Although (in the case of gases only) the speed of sound is expressed in terms of a ratio of both density and pressure, these quantities cancel in ideal gases at any given temperature, composition, and heat capacity. This leads to a velocity formula for ideal gases which includes only the latter independent variables.In common everyday speech, speed of sound refers to the speed of sound waves in air. However, the speed of sound varies from substance to substance. Sound travels faster in liquids and non-porous solids than it does in air. It travels about 4.3 times as fast in water (1,484 m/s), and nearly 15 times as fast in iron (5,120 m/s), as in air at 20 °C. Sound waves in solids are composed of compression waves (just as in gases and liquids), but there is also a different type of sound wave called a shear wave, which occurs only in solids. These different types of waves in solids usually travel at different speeds, as exhibited in seismology. The speed of a compression sound wave in solids is determined by the medium's compressibility, shear modulus and density. The speed of shear waves is determined only by the solid material's shear modulus and density.In fluid dynamics, the speed of sound in a fluid medium (gas or liquid) is used as a relative measure for the speed of an object moving through the medium. The speed of an object divided by the speed of sound in the fluid is called the Mach number. Objects moving at speeds greater than Mach1 are travelling at supersonic speeds.
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