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3 years ago

When sound waves are reflected back to the source, the reflected sound is called

Physics

2 answers:

sergey [27]3 years ago

6 0

It’s an echo :))))))

Phoenix [80]3 years ago

3 0

Hejehddhshs ajahsvsise akaueegsgw amajsieuege ajwhevegeueje akwjegevsbeieu wish’s

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An archery contestant

storchak [24]

Answer: A

Explanation:

8 0

3 years ago

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Parasaurolophus was a dinosaur whose distinguishing feature was a hollow crest on the head. The 1.3 m long hollow tube in the cr

yarga [219]

Answer:

67.31 Hz, 201.92 Hz, 336.54 Hz

Explanation:

Resonance also known as standing wave occur when a uniform tube is closed at one end and open at the other end.

For a resonance wave in a tube with length b, wavelength λ of resonance wave is 4b because a quarter wave is formed in the tube, that is,

λ = 4b.

When the speed of sound is c, the frequency of sound, f, is

f = c /λ,

and therefore,

f = c / ( 4b ).

From the question,

When c = 350 m/s and b = 1.3 m,

using the formula

fn = c / ( 4b ) × n (n = 1, 3, 5, ...).

The first three resonant frequencies are;

First resonance frequency is

f = 350 / (4*1.3) * 1 = 67.31 Hz

Second resonance frequency is

f = 350 / (4*1.3) * 3 = 201.92 Hz

Third resonance frequency is

f = 350 / (4*1.3) * 5 = 336.54 Hz

5 0

3 years ago

Connelly cuts a solid object in half. What happens to the mass, volume, and density of the object that Connelly cuts? A)The mass

amm1812

I think the correct answer would be D. After cutting the solid object in half, the mass and volume are both divided by two, but the density remains the same. The mass and volume would change accordingly to satisfy the law of conservation of mass which states that mass cannot be created or destroyed. So, after dividing the object the sum of the mass of the two parts should be equal to the original mass of the object. This would also be the same for the volume of the objects. Density is the ratio of mass and volume and, since the mass and volume change accordingly, the value of the density would still be the same regardless of the object being divided.

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3 years ago

What happen to the bulb when it is in series connection?

coldgirl [10]

If the bulb is in series with something else, then . . .

-- The brightness of the bulb depends on the other device in the circuit.

-- If the other device is designed to use less power than the bulb, then the
other device gets more power than the bulb gets.

-- If the other device is designed to use more power than the bulb, then the
other device gets less power than the bulb gets.

-- If the other device is removed from the circuit, then the bulb doesn't light at all.

This description of the often-screwy behavior of a series circuit may partly explain
why the electric service in your home is not a series circuit.

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2 years ago

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A 0.145-kg baseball pitched horizontally at 35.0 m/s strikes a bat and is popped straight up to a height of 40.0m. If the contac

Nookie1986 [14]

Answer:

$F = 2.6 \times 10^3 N$