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3 years ago

11

Write any two differences between echo and reverberation.

1 answer:

anzhelika [568]3 years ago

3 0

Answer:

1) Because of the size and time the sound wave moves, an echo is typically transparent and easy to discern. Since reverberations typically don't have enough distance or time to fly, they will pile up on top of each other, making it impossible to understand.

People will detect an echo if the distance between the source of the sound and the reflected body is greater than 50 feet. When a sound wave is bounced off a nearby surface, it may create a reverberation.

2) The speed of sound in hot air is more than that in cold air because air molecules are traveling faster in hot air.

Explanation:

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Three tiny charged metal balls are arranged on a straight line. The middle ball is positively charged and the two outside balls

Sedbober [7]

Answer:

a)

The magnitude of the attractive force is $14.29N$

b)

The magnitude of the repulsive force is $0.357N$

c)

The magnitude of the net force is $0N$

Explanation:

The explanation is shown on the first and second uploaded image

4 0

4 years ago

The deviation of a value (x) from the mean of the sample divided by the standard deviation (s)of the sample is known as the "z"

Ugo [173]

Answer:

true.

Explanation:

z-score gives an idea of how far the value of data is from the mean point. Basically is the measure of a standard deviation below or above the mean.

More the deviation of the data from the mean more is the standard deviation.

Z-score or value is calculated by the expression given below:

$z = \dfrac{x-\mu}{\sigma}$

x is the value

μ is the mean

σ is the standard deviation

Hence, the statement given is true.

6 0

3 years ago

What happens when you put a metallic object on a charger while it is chstging?

Ganezh [65]

It gets attracted due to electro magnetizing

3 0

3 years ago

A centripetal force of <img src="https://tex.z-dn.net/?f=F_c" id="TexFormula1" title="F_c" alt="F_c" align="absmiddle" class="la

Minchanka [31]

Answer:

The centripetal on the car will become 4 times when the velocity gets twice.

Explanation:

As we know that centripetal force on the car of mass m and moving with constant speed v given as

$F_c=\dfrac{mv^2}{r}$

m=mass

v=velocity

r=radius of the circular arc

We are assuming that the mass of the both the car is same.

If the velocity of the car gets twice 2 v

The new centripetal force on the car

$F_c'=\dfrac{m(2v)^2}{r}$

$F_c'=4\dfrac{mv^2}{r}$

$F_c'=4\ F_c$

Therefore we can say that centripetal on the car will become 4 times when the velocity gets twice.

3 0

3 years ago

Two lightbulbs work on a 120-V circuit One 50 W and the other is 100 W. Which bulb has a higher resistance? Explain pls!!!!

Sladkaya [172]

Answer:

Bulb 1 has more resistance.

Explanation:

Given that,

Two lightbulbs work on a 120-V circuit.

The power of circuit 1, P₁ = 50 W

The power of circuit 2, P₂ = 100 W

We need to find the bulb that has a higher resistance.

The power of the bulb is given by :

$P = \dfrac{V^2}{R}$

For bulb 1,

$R_1=\dfrac{V^2}{P_1}\\\\R_1=\dfrac{(120)^2}{50}\\\\R_1=288\ \Omega$

For bulb 2,

$R_2=\dfrac{V^2}{P_2}\\\\R_2=\dfrac{(120)^2}{100}\\\\R_2=144\ \Omega$

So, bulb 1 has higher resistance.

8 0

3 years ago