All categories

3 years ago

Sound energy into electricity?

1 answer:

7 0

The vibrations created by noise can be converted to electrical energy through the principle of magnetic Induction, for example by using transducer.

You might be interested in

11.76 cm² into two significant figures and include the appropriate units

PilotLPTM [1.2K]

You will need to turn this into scientific notation, so:

1.176 × 10^1 cm^2

To two significant figures means to two digits so since 7 is greater than 5, you will need to round up.

Final answer is:

1.2×10^1 cm^2

8 0

4 years ago

Two identical loudspeakers are driven in phase by the same amplifier. The speakers are positioned a distance of 3.2 m apart. A p

arsen [322]

Answer:

C) 413 Hz

Explanation:

For destructive interference, the path difference ΔL = (n + 1/2)λ where ΔL = L₂ - L₁ where L₁ = person's distance from one speaker (the closer one) = 5.0m and L₂ = person's distance from other speaker (the farther one) = 6.2 m and λ = wavelength = v/f where v = speed of sound = 330 m/s and f = frequency

So, ΔL = (n + 1/2)λ

L₂ - L₁ = (n + 1/2)v/f

f = (n + 1/2)v/(L₂ - L₁)

At the second lowest frequency that results in destructive interference at the point where the person is standing, n = 1.

So,

f = (1 + 1/2)v/(L₂ - L₁)

f = 3v/2(L₂ - L₁)

Substituting the values of the variables into the equation, we have

f = 3v/2(L₂ - L₁)

f = 3(330 m/s)/2(6.2 m - 5.0 m)

f = 3(330 m/s)/2(1.2 m)

f = 990 m/s ÷ 2.4 m)

f = 412.5 Hz

f ≅ 413 Hz

5 0

3 years ago

Why can water stay in bucket if you spin it upside down, if you spin the bucket fast enough? What are some practical application

Aleksandr [31]

Answer:

Water stay in the bucket if the bucket is spin upside down and fast because due to centripetal force.

Explanation:

When the bucket is at highest point in the circular motion then there will be three forces work centripetal force in upward direction ann normal and weight will work in downward direction.

By newton law,

centripetal force=weight + normal force.

$\frac{mv^{2} }{r}=N+mg\\ N=\frac{mv^{2} }{r}-mg$

If the water will stay in the bucket in upside direction then there will be normal force is positive which means the centripetal force is greater than weight.

And to increase the centripetal force velocity should be greater because it depends on velocity.

The practical application of centripetal force are discussed below:

(a) Turning of the car on a banked road or in circular track.

(b) Revolution of the earth around the sun.

7 0

4 years ago

Spring #1 has a force constant of k, and spring #2 has a force constant of 2k. Both springs are attached to the ceiling. Identic

Gre4nikov [31]

Answer:

The ratio of the energy stored by spring #1 to that stored by spring #2 is 2:1

Explanation:

Let the weight that is hooked to two springs be w.