Which reading strategy helps you to read and understand a passage quickly by making use of your previous knowledge?

Two loudspeakers, A and B are driven by the same amplifier

DedPeter [7]

<h3>Complete Question </h3>

Q)Two loudspeakers, A and B, are driven by the same amplifier as shown and emit sinusoidal waves in phase. Speaker B is 2.00 m to the right of speaker A. Consider point Q along the extension of the line connecting the speakers, 1.00 m to the right of speaker B. Both speakers emit sound waves that travel directly from the speaker to point Q. a) What is the lowest frequency for which constructive interference occurs at point Q? b) What is the lowest frequency for which destructive interference occurs at point Q? The speed of sound wave is 344 m/s.

Answer:

lowest frequency is 172 Hz. for n = 1

lowest frequency is 86 Hz for n = 0

Explanation:

(a) Constructive interference takes place when the path difference is n where n=1,2,3 ...

frequency f = v /λn

= v n / d

= n ( 344 / 2 )

= n ( 172 ) Hz.

lowest frequency is 172 Hz

b)Destructive interference takes place when the path difference is n/2 x where n=1,3,5 ...

λ = 4/2n+1

for n = 0

λ = 4m

f = 344/4

f = 86 Hz.

lowest frequency is 86 Hz

3 0

4 years ago

If an X-ray beam of wavelength 1.4 × 10-10 m makes an angle of 30° with a set of planes in a crystal causing first order constru

kkurt [141]

Answer:

Plane spacing, $d=1.4\times 10^{-10}\ m$

Explanation:

It is given that,

Wavelength of x-ray, $\lambda=1.4\times 10^{-10}\ m$

Angle the x-ray made with a set of planes in a crystal causing first order constructive interference is 30 degrees

We need to find the plane spacing. It is based on Bragg's law such that,

$2d\sin\theta=n\lambda$

d is plane spacing

n = 1 here

$d=\dfrac{\lambda}{2\sin\theta}\\\\d=\dfrac{1.4\times 10^{-10}}{2\times \sin (30)}\\\\d=1.4\times 10^{-10}\ m$

So, the plane spacing is $1.4\times 10^{-10}\ m$ .

5 0

4 years ago

7. Delia Gonzalez, Mother of Felix, said Felix wanted to play Football but

Gelneren [198K]

Determinatio/Goal setting

4 0

2 years ago

A pilot is flying a commercial plane from New York City to Orlando. If the pilot fails to take the Coriolis Effect into account,

grin007 [14]

Answer:

B. East of NYC

Explanation:

We can make this conclusion because for one reason New York City is the Northern Hemisphere, and according to the Coriolis effect when objects in the Northern Hemisphere travel long distances above the ground, they will be deflected to the right as a result of earth's rotation.

Hence, going by the map of New York on the Northern Hemisphere, when the (object) flight is deflected to the right, for someone in NYC it will indicate a shift to the east of NYC since the pilot failed to take the Coriolis Effect into account.

5 0

3 years ago

A ship can carry more load than aeroplane of same size. why?

stepladder [879]

Answer:

density of water is much greater than density of air

Explanation:

when body is in fluid it carries weight which is always equal to upthrust

upthrust is given as

upthrust= density of fluid ×strength of gravitational field g × volume of body in fluid

as volume of ship and aeroplane is same and strength of gravitational field or acceleration due to gravity is same hence upthrust depens upon density of fluid .

density of air is about 1.2 kg/m^3 and density of water is 1000kg/m^3 hence ship carries more load

8 0

4 years ago