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Gnom [1K]
3 years ago
7

1. Two loudspeakers are placed 4.5 m apart. They produce the same sounds, in step, at a frequency of 829 Hz. Constructive interf

erence is observed at point P, which is 5.30 m from one loudspeaker and a distance x from the other. Which is a possible value of x? Assume the speed of sound is 340 m/
a.6.60

b. 6.77

c. 6.80

d. 6.88

e. 6.53

2. Two loudspeakers are placed 6.0 m apart. They produce the same sounds, in step, across a frequency range of 252 Hz to 665 Hz. Point P is located 5.10 m from one loudspeaker and 3.60 m from the other. What frequency of sound from the two speakers will produce constructive interference at point P? Assume the speed of sound is 344 m/s.

a. 631
b. 401
c. 459
d. 573
c. 516
Physics
2 answers:
liberstina [14]3 years ago
8 0

What was the answer? I go to Connexus too and I’m struggling in physics.

ahrayia [7]3 years ago
7 0

#1

speed of sound = 340 m/s

frequency = 829 Hz

wavelength of sound = speed / frequency

\lambda = \frac{340}{829} = 0.41 m

Now for constructive interference we know that

path difference of two waves = integral multiple of wavelength

x - 5.30 = N\lambda

x = 5.30 + N\lambda

if N = 3

x = 6.53 m

#2

speed of sound = 344 m/s

frequency range = 252 Hz - 665 Hz

wavelength of sound = speed / frequency

\lambda = \frac{344}{f}

Now for constructive interference we know that

path difference of two waves = integral multiple of wavelength

5.10 - 3.60 = N\lambda

N\lambda = 1.5

Now we will have

\lambda = \frac{v}{f}

\frac{1.5}{N} = \frac{344}{f}

by rearranging above terms we have

f = \frac{N(344)}{1.5} = 229.3N

f = 459 Hz

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DaniilM [7]

We want to see if the Trust SSC can archive a higher maximum speed.

Remember the second Newton's law:

Force = mass*acceleration.

And acceleration is the rate of change of the velocity.

Assuming the mass of the Trust SSC does not change, increasing the force would mean that we increase the acceleration, and thus, <u>larger </u><u>velocities </u><u>can be reached.</u>

<u />

Now there are some problems.

How we do increase the force?.

It is hard to ve precise, mostly because we don't really know how the system works, we just got some given random data that we can't use without context.

Another thing we need to remember, this velocity is measured in only one mile. So because we have a<em> fixed distance to measure it</em>, we only can get larger velocities by increasing the acceleration.

And to increase the acceleration we can increase the force, as discussed, or, decrease the mass.

How to decrease the mass? Using lighter materials.

Now let's see an example on how decreasing the mass would affect the acceleration.

  • Mass = 10,700kg
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Then an aproximate force is given by:

F = 10,700kg*20.8 m/s^2 = 222,560 N

Now, if we decrease the mass a little bit, for example to 10,000kg, and we do not change the force, the new acceleration will be given by:

10,000kg*a = 222,560 N

a = (222,560 N)/(10,000kg) = 22.3 m/s^2

So decreasing the mass a little, increases the acceleration, which would make a larger maximum velocity.

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Decreasing the mass of the car.

If you want to learn more, you can read:

brainly.com/question/12550364

7 0
3 years ago
Suppose a conducting rod is 52 cm long and slides on a pair of rails at 2.75 m/s. What is the strength of the magnetic field in
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Answer:

5.6 Tesla

Explanation:

L = 52 cm = 0.52 m

V = 2.75 m/s

e = 8 V

Let B be tha magnitude of magnetic field. Use the formula for the motional emf

e = B × V × L

B = e / V L

B = 8 / (2.75 × 0.52)

B = 5.6 Tesla

6 0
3 years ago
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Sladkaya [172]

Answer:

Explanation:

The rotational kinetic energy remains constant as long as the length and angular speed are fixed.

Statement A is true.

When the ball is pulled inward and the length of the string is shortened, the rotational kinetic energy will remain constant due to conservation of energy,

Statement B is false .

Reason - Conservation of energy will not be there because external work is done on the system  by the force that pulls it inward.  

but the angular momentum L will not remain constant because there is an external force acting on the ball to pull it inward

Statement C is false .

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Reason - because distance from axis of rotation is changing.

the angular speed will remain the same throughout the process because the ball is rotating in the same plane throughout the motion.

Statement E is false

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Effectus [21]

Answer:

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7 0
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