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According to their frequencies, waves are separated into three categories:
(1) Audible or sound waves : Range 20 Hz to 20 KHz. These are formed by vibrating bodies like as vocal cords, membrane or stretched strings.
(2) Infrasonic waves : Frequency lie below 20 Hz.
Example : waves formed during earth quake, ocean waves etc.
(3) Ultrasonic waves : Frequency greater than 20 KHz. Human ear cannot listen these rays, certain creatures such as dog, bat and mosquito show result to these.
Q. In the given circuit, calculate the potential differences across each resistor Solution : i) R s = R 1 + R 2 + R 3 = 10Ω ii) Current in circuit I = V/R s
How does laser printer works? When a text or image is entered into the CPU, it makes a series of varying voltages. This controls a LED (light emitting diode) in the printer. Th
Magnetic monopole A hypothetical particle that sinks of the magnetic field & constitutes sources. Magnetic monopoles have never been determined, but would cause fairly minor m
Can you please reply to my email? my quiz about to start here. I tried calling you guys, but no one answered the phone. If I don''t get a reply in 15 min, I''ll have to ask for a r
Explain the laws of solid friction
As the temperature of the air enhances from 0 degrees C to 20 degrees C, the wavelength of a sound made by a tuning fork of fixed frequency does which of the following? Does th
Shear force diagram (SFD) and bending moment diagram (BMD) are a graph of shear force / bending moment plotted against the horizontal axis x, indicating the shear force / bending m
as flux = E.A and flux density is equal to flux/A then why A/A cannot e cancelled ?
why does rain water boils faster than fresh water
A plano - convex lens of radius of curvature 2.5 m is placed on an optically plane glass plate in air medium and a parallel beam of monochromatic light is incident normal
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