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kykrilka [37]
4 years ago
8

When radio waves try to pass through a city, they encounter thin vertical slits: the separations between the buildings. This cau

ses the radio waves to diffract. In this problem, you will see how different wavelengths diffract as they pass through a city and relate this to reception for radios and cell phones. You will use the angle from the center of the central intensity maximum to the first intensity minimum as a measure of the width of the central maximum (where nearly all of the diffracted energy is found).
Physics
1 answer:
Westkost [7]4 years ago
4 0

Answer:

\theta= sin^{-1}(\frac{\lambda}{a})

Explanation:

Assuming we have to find

Find the angle theta to the first minimum from the center of the central maximum (Expressing answer in terms of λ  and a.):

a= avg separation between the building.

λ = wavelength

for single slit diffraction we have

a sinθ =nλ

for the first minimum n=1

a sinθ =λ

therefore,

\theta= sin^{-1}(\frac{\lambda}{a})

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A bead moves in a fixed direction during an interval. The graph shows the displacement of the bead from its starting point. What
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Answer:A

Explanation:

I just did the same question on usatestprep

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3 years ago
You throw a ball with a mass of 0.50 kg against a brick wall. It hits the wall moving horizontally to the left at 20 m/s and reb
Orlov [11]

Answer:

The value of impulse of the net force on the ball during its collision with wall is  I = 15\ kg \frac{m}{s}

The value of average horizontal force that the wall exerts on the ball during the impact is F = 15000 N

Explanation:

Mass of the ball = 0.5 kg

Horizontal velocity V_{x} = 20 \frac{m}{s}

Velocity after collision V_{-x} = - 10 \frac{m}{s}

(A). Impulse of the net force on the ball during its collision with wall is

I =  m (V_{x} - V_{-x})

I = 0.5 × (20 + 10)

I = 15\ kg \frac{m}{s}

This is the value of impulse of the net force on the ball during its collision with wall.

(B). The magnitude of average horizontal force

F = \frac{I}{T}

Where F = Force

I = impulse & t = time interval = 0.001 sec

F = \frac{15}{0.001}

F = 15000 N

This is the value of average horizontal force that the wall exerts on the ball during the impact.

8 0
3 years ago
Electrons have _______ charge.
Nikolay [14]

Answer:Electrons have negative charge.

Explanation:Electrons are designated to be the carriers of negative charge. The assignment of negative and positive to electrons and protons respectively can be attributed to Benjamin Franklin. He could have easily reversed this designation. Like all charged particles, negative charges create electric fields around them.

7 0
4 years ago
At atmospheric pressure, what is the characteristic boiling point of water,in degrees Celsius
Marina86 [1]
At standard atmospheric pressure, 100° C
is defined as the boiling point of water.
3 0
4 years ago
Two violinists are trying to tune their instruments in an orchestra. One is producing the desired frequency of 440.0 hz. The oth
Katyanochek1 [597]

Answer:

Percentage change in tension is 3.8%

Explanation:

We have given initially frequency f_1 = 440 Hz

Let tension in the string at this frequency is T_1

Now second frequency is f_2=448.4Hz

Frequency in string is given by

f=\frac{1}{2L}\sqrt{\frac{T}{\mu }}

From the relation we can say that

\frac{f_1}{f_2}=\sqrt{\frac{T_1}{T_2}}

\frac{440}{448.4}=\sqrt{\frac{T_1}{T_2}}

{\frac{T_2}{T_1}}=1.038

Percentage change in tension is equal to

=\frac{T_2-T_1}{T_1}=\frac{T_2}{T_1}-1=(1.038-1)\times 100=3.8 %

So percentage change in tension is 3.8%

4 0
3 years ago
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