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* Question 1 : Sound A has intensity 10 times the threshold if hearing : sound B has intensity 100 times the threshold of haring . How much louder do we perceive sound B ? * Ques
Two friends are at the local high school track, a circle measuring 440 yards for one complete lap. Abe can jog at 8.2 miles per hour while Bob’s jogging speed is 4.6 miles per hour
Stress is measured by the deforming force per unit normal area. Stresses set up in an object due to of the action of forces can be divided into three broad categories (a) Ten
Becquerel; Bq (after A.H. Becquerel, 1852-1908) The derived SI unit of activity, described as the activity of a radionuclide decreasing at rate, on the average, of one nuclear
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Are fibers safe? Fiber optics are passive components, hence do not use power to generate light, like the case with lamps. When light conductors only carry light from one point
Explain the Density Density is a measure of how densely packed matter is. One standard brick weighs more than the same size piece of Styrofoam but less than the same size bric
If the resultant force acting on a body of constant mass is zero, the body's momentum is: a) Increasing b) Decreasing b) Always zero d) Constant Ans: If
Voltages relative to earth It is very common in electrical circuits to have an earth connection. This earth connection has no effect on potential differences across components
(a) Explain the terms: 'magnetic field strength', 'magnetic flux density' and 'permeability' of a magnetic material. Write their SI units. A current carrying conductor is placed
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