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1 year ago

A periodic wave with wavelength 2m has a speed of 4m/s. What is the waves frequency?.

Physics

1 answer:

Gekata [30.6K]1 year ago

5 0

The wave frequency is 2 Hz.

What is wave frequency ?

The number of waves that pass through a fixed point in a given amount of time is referred to as the wave frequency. The hertz is the SI unit for wave frequency (Hz).

$f = v / w$

where,

$f = frequency\\v = speed \\w = wavelength$

Given,

$v = 4 m/s, w = 2 m$

$f = 4/2 \\f = 2 Hz\\$

The waves frequency is 2 Hz.

To know more about wave frequency,check out:

brainly.com/question/15830195

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A flat circular coil having a diameter of 25 cm is to produce a magnetic field at its center of magnitude, 1.0 mT. If the coil h

tresset_1 [31]

Answer:

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Explanation:

Given that,

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Number of turns = 100

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$B =\dfrac{\mu_{0}NI}{2\pi r}$

$I=\dfrac{B\times2\pi r}{\mu N}$

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Put the value into the formula

$I=\dfrac{1.0\times10^{-3}\times2\pi\times12.5\times10^{-2}}{4\pi\times10^{-7}100}$

$I=6.25\ A$

Hence, The current passes through the coil is 6.25 A

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Can a 20 N force and 40 N force ever produce a resultant with magnitude of 27 N?

SVEN [57.7K]

Sure ,Let's find angle between forces

Vectors be A and B and resultant be R

$\\ \sf\longmapsto R^2=A^2+B^2+2ABcos\theta$

$\\ \sf\longmapsto 27^2=20^2+40^2+2(20)(40)cos\theta$

$\\ \sf\longmapsto 729=400+1600+1600cos\theta$

$\\ \sf\longmapsto 729=2000+1600cos\theta$

$\\ \sf\longmapsto 1600cos\theta=-271$

$\\ \sf\longmapsto cos\theta=-0.169$

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