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3 years ago

A wave has a speed of 50 m/sec. If its frequency is 100 Hz,

Physics

1 answer:

Gre4nikov [31]3 years ago

7 0

Wave speed= Frequency x Wavelength

-> Wavelength= Wave speed divide Frequency

-> 50m/s divide 100Hz= 0.5m

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Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time—called pulsed lasers. T

alex41 [277]

Answer:

30643 J

Explanation:

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

t = Time taken = 1 ns

c = Speed of light = $3\times 10^8\ m/s$

$E_0$ = Maximum electric field strength = $1.52\times 10^{11}\ V/m$

A = Area = $1\ mm^2$

Magnitude of magnetic field is given by

$B_0=\dfrac{E_0}{c}\\\Rightarrow B_0=\dfrac{1.52\times 10^{11}}{3\times 10^8}\\\Rightarrow B_0=506.67\ T$

Intensity is given by

$I=\dfrac{cB_0^2}{2\mu_0}\\\Rightarrow I=\dfrac{3\times 10^8\times 506.67^2}{2\times 4\pi \times 10^{-7}}\\\Rightarrow I=3.0643\times 10^{19}\ W/m^2$

Power, intensity and time have the relation

$E=IAt\\\Rightarrow E=3.0643\times 10^{19}\times 1\times 10^{-6}\times 1\times 10^{-9}\\\Rightarrow E=30643\ J$

The energy it delivers is 30643 J

4 0

3 years ago

Which type of wave interaction is shown in the diagram?

masya89 [10]

Answer: Constructive interference

Explanation: Just took the test

5 0

3 years ago

Identify the subordinate clause and tell if it is used as a noun, adjective, or adverb. Click on the blue box until the correct

charle [14.2K]

The subordinate clause is "<span>who are loyal and industrious" and is used as an adjective to describe students.</span>

7 0

3 years ago

A jogger runs 300 meters due east and then turns and runs 500 meters due west.

valentina_108 [34]

It’ll be 200 meters West because 500-300=200 and The west direction has the greatest force you could say ... Anytime you have a question asking about displacement you subtract then use the direction with the greatest number ..

3 0

3 years ago

What net force is needed to increase the velocity of a 5 kg object by 3 m/s over the course of 2.5 seconds?

mixer [17]

Hi there!

Recall Newton's Second Law:

$\large\boxed{\Sigma F = ma}$

∑F = net force (N)

m = mass (kg)

a = acceleration (m/s²)

We must begin by solving for the acceleration using the following:

a = Δv/t

In this instance:

Δv = 3 m/s

t = 2.5 sec

a = 3/2.5 = 1.2 m/s²

Now, plug this value along with the mass into the equation for net force:

$\Sigma F = 5(1.2) = \boxed{6 N}}$

6 0

3 years ago

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