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Demonstrate the typical ultrasonic flaw detector in its reflection modes?
A typical ultrasonic flaw detector into its reflection modes is as demonstrated below:
Assume that d be the distance of flaw by the transducer; and ‘v’ be the velocity of sound into the test specimen as well as t be the time of flight. In that case the total distance travelled by the sound into the specimen
v = (2d)/t or d = (vt)/2
The given diagram shows such echo pattern indicating the presence of a defect.
a pendulum is timed ,first for 20 swings and then for 50 swings ; time for 20 swings = 17.4 sec and time for 50 sec = 43.2. calculate the average time per swing/
If a great point-mass is removed by a weightless, inextensible and perfectly flexible string from a rigid support, then this arrangement is known as a simple pendulum.
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The government uses monetary and fiscal policy to mitigate the effects of economic fluctuations
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A concave lens when given in air has a focal length of 0.4 m and has a refractive index of 3/2. Evaluate its focal length when immersed in water of refractive index 4/3?
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