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Whenever there is a relative speed among a source of sound and the listener, the apparent frequency of sound listen by the listener is dissimilar from the real frequency of sound emitted by the source.
When the distance among the source and listener is reducing the apparent frequency enhances. It describes the apparent frequency is more than the real frequency of voice. The reverse is also true.
Microwaves and Radio waves: Microwaves are produced by high frequency electromagnetic oscillators in electric circuits. Microwaves are electromagnetic waves with wavelengths i
The half-life of an isotope of an element is 5 days. The mass of a 10 gram sample of this isotope remaining after 20 days is: a) 0.312 grams b) 0.625 grams c) 1.25 g
Explain Radioactivity and its Problems and Applications ? All radiation, electromagnetic as well as the kind from nuclear decay, takes its toll on living organisms. If the radiati
Select one membrane industrial separation application for (i) reverse osmosis (RO), (ii) ultrafiltration (UF) and (iii) microfiltration (MF) (at least one of the three (in total
A boy throws a ball vertically upward with a velocity of 6 meters per second. How long does it take the ball to return to the boy's hand? Ans: A boy throws a ball vertically
Conductor: Conductors are those substances which permit electric current to passes easily by them. e.g. Metal, impure, water etc.
An electron is constrained to the central perpendicular axis of a ring of charge of radius 2.2 m and charge 0.015 mC. See Section 22-6. Suppose the electron is released from rest a
A battery and the plug points in the switch boards home give potential difference. What is the disimilar in the nature of the current given by the two? Compare and contrast the tw
Resolution of Forces by Calculation: One vector was resolved into two mutually perpendicular components. So if there are several vectors each can be resolved into two
What is the wavelength of electromagnetic waves of frequency 5 x 1019Hz in free space? Give its two applications.
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