Astopped pipe 1.00 m in length is filled with helium at 20∘c (speed of sound 999 m/s). when the helium in this pipe vibrates at its third harmonic frequency, it causes the air at 20∘c (speed of sound 344 m/s) in a nearby open pipe to vibrate at its fifth harmonic frequency. what is the frequency of the sound wave in the helium in the stopped pipe? express your answer with the appropriate units.

The frequency of the sound wave in the helium in the stopped pipe is 749.25 Hz.

Explanation:

Given that,

Length = 1.00 m

Temperature T = 20°C

Speed of sound = 999 m/s

We need to calculate the frequency of the sound wave in the helium in the stopped pipe

Using formula of frequency

Put the value into the formula

Hence, The frequency of the sound wave in the helium in the stopped pipe is 749.25 Hz.

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electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

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