TS Grewal Solutions Class 11 Accountancy.TS Grewal Solutions Class 12 Accountancy.CBSE Previous Year Question Papers Class 12.CBSE Previous Year Question Papers Class 10.NCERT Solutions For Class 6 Social Science.NCERT Solutions for Class 7 Social Science.NCERT Solutions for Class 8 Social Science.Thus, this frequency can be used to calculate the speed of wave in metal: v metal = f metal. The frequency of the sound in the air f air is the same as that in the metal rod f metal, that is f air = f metal. Of the sound waves in the air can be obtained by measuring the distance between consecutive Antinodes (the distance is equal to 1/2 of wavelength). The Antinode is located at the center of each striation (grooves) formed by the maximum displacement of the powder. The nodes are labeled N in the above figure and the antinodes are labeled A. These standing waves can be observed by lightly coating the inside of the glass tube with a very dry powder (cork dust). The antinodes of the standing wave pattern are the points in which the air molecules have a maximum displacement, whereas the nodes are the points in which the air molecules are not displaced. If the length of the air column is correct, then a standing wave pattern is set up inside the air column. The air in the glass tube is simultaneously acted upon by two sets of waves traveling in opposite directions. When the sound waves enter the air column from the disk, they travel along the length of the glass column, strike the end of the tube, and are reflected back up the tube. The vibrating disk, in turn, causes the air inside the glass tube to vibrate with the same frequency as the rod. The rod's vibrations are transmitted to the disk so that the disk moves back and forth with the end of the rod. The far end of the air column is either closed (with a rubber stopper, or a cork), or left open, and the other end of the air column is a disk, which is attached to one end of the vibrating metal rod. Part of the metal rod is inside a glass tube filled with air, forming an air column. The sound waves passing through the metal rod can be transmitted to a gas such as air by means of an apparatus that is known as Kundt's tube. Of the sound waves in the metal rod is twice the length of the rod, that is Standing waves are set up in the rod and if the rod is clamped at its center, the midpoint of the rod is a node of the standing wave and each end of the rod is an antinode of the standing wave. Sound waves may be sent through a metal rod by stroking one end of the rod with a rosined piece of cloth or leather. ![]() Where Y is the Young's modulus for the substance through which the sound is passing andĮxperimental Determination of the Speed of Sound in a Metal. The speed of sound v through a metal rod is given by Therefore, they respond to each other's motions and are able to transmit a wave disturbance through the materials. ![]() This seems reasonable because the molecules in an elastic material are tightly coupled. In general, the stiffer a material is, the faster sound travels through it. The speed of sound in a material depends on the compressibility (elasticity) and density of the material through which it is passing. Sound waves travel through solids, liquids, and gases at different speeds. The wavelength of a longitudinal wave is the distance between any two consecutive compressions or rarefactions. The frequency of a longitudinal wave is the number of compressions or rarefactions that pass any point in the elastic medium in one second. Thus the speed v of a sound wave is given by Sound waves also obey the fundamental equation of wave propagation. When the molecules are spread farther apart than normal, the region of lower density is called a rarefaction. When the molecules are forced closer together than normal, the region of higher density and pressure is called a compression or condensation. The elastic medium in the path of the sound waves becomes alternately denser and rarer. The source of sound waves is a vibrating object such as loud speaker, a tuning fork, or a metal rod. Sound waves are longitudinal waves traveling through an elastic medium. Exp.3 Kundt's Tube - The Speed of Sound in Metals Theory
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