# Gram weights to determine its mass the solids volume

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gram weights to determine its mass - The solid’s volume is then determined from the volume of water it displaces - This is easily measured by filling a cylinder with a known volume of water (V1), adding the object, and measuring the new water level (V2). The difference V2- v1 in milliliters is equal to the volume of the solid. The volume of gases and liquids vary considerably with the temperature. When determining density, it is important to control and record the temperature at which the measurements are made. - Temperature of water increases, as its volume expands

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Fahrenheit scale is the temperature scale using the melting point of ice as 32 degrees and the boiling point of water as 212 degrees, with 180 equal divisions or degrees between Celsius scale is the temperature scale using the melting point of ice as 0 degrees and the boiling point of water as 100 degrees, with 100 equal division or degrees between The observation that a solid object either: - Sinks - Floats - Or remains suspended When immersed in a liquid can be accounted for by the property of density Example: - If the density of a solid is greater than that of the liquid in which it is immersed, the object sinks; - If the solid’s density is less than of the liquid, it floats - And when the solid and liquid have equal densities, the solid remains suspended in the liquid The force with which gravity attracts a body is called weight (means that the earth’s gravity is pulling you down with a force of that specific weight) Mass differs from weight because it refers to the amount of matter an object contains and is independent of its location on earth or any other place in the universe. - W= mg (Weight = mass times g which is the acceleration imparted to a body by the force of gravity). - Mass is a constant property of matter that reflects the amount of material present - Weight is a property of matter that depends on both the mass of a substance and the effects of gravity on that mass For determining the density of a solid is first to measure its mass on a scale and then measure its volume by noting the volume of water it displaces - Density = mass / Volume (V2-V1) Refractive Index Refraction is the bending of a light wave as it passes from one medium to another Light waves can travel in air at a constant velocity of nearly 300 million meters per second until they penetrate another medium such as glass or water, at which point they are suddenly slowed, causing the rays to bend. - The bending of light wave because of a change in velocity is called refraction - As the rays leave the water and enter the air, their velocity suddenly increases, causing them to be refracted The ratio of the velocity of light in a vacuum to that in any medium determines the refractive index of that medium and is expressed as follows:
- Refractive index = velocity of the light in vacuum/ velocity of light in medium - Refractive index is the ratio of the speed of light in a vacuum to its speed in a given substance Refractive index is an intensive physical property of matter and

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• Fall '19
• Light, Wavelength, refractive index

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