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nordsb [41]
4 years ago
7

Would you hear an echo if you shouted in your bedroom? Explain your answer.

Physics
2 answers:
Sindrei [870]4 years ago
8 0

Answer:

if your bedroom is empty yes but if not most likely no

Explanation:

Why Cannot we hear an echo in a small room?

They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.Obviously,in a small room echoes cannot be heard.

Zinaida [17]4 years ago
7 0

Answer:No

Explanation:It depends on the size of the room and the things that are in the room. You need to find a hall that is empty and big.

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1. What are the units of area under the line/curve?<br> 2. Does the area have any meaning?
TiliK225 [7]

The area under the velocity time graph is 125 m and the meaning of the area is displacement.

<h3>What is area under velocity - time graph?</h3>

The area under a velocity time graph represents the displacement of the object.

total area of the graph = A1 + A2

total area of the graph = ¹/₂ (base₁)(height₁) + ¹/₂ (base₂)(height₂)

total area of the graph = ¹/₂(4)(40) + ¹/₂(3)(30)

total area of the graph = 125 m

Thus, the area under the velocity time graph is 125 m and the meaning of the area is displacement.

Learn more about velocity time graph here: brainly.com/question/4710544

#SPJ1

6 0
2 years ago
A man with a mass of 70 kg walks up a flight of stairs that is 5 m tall. Another man with a mass of 80 kg walks up the same flig
Alex_Xolod [135]
It's 'D'. You need to know the time in order to calculate power.
5 0
3 years ago
What do you mean by velocity ratio of a wheel and axle​
IgorC [24]

Answer:

Explanation:

In wheel and axle. …with the system is the velocity ratio, or the ratio of the velocity (VF) with which the operator pulls the rope at F to the velocity at which the weight W is raised (VW). This ratio is equal to twice the radius of the large drum divided by the difference…

5 0
3 years ago
A velocity selector is built with a magnetic field of magnitude 5.2 T and an electric field of strength 4.6 × 10 ^ 4 N/C. The di
nydimaria [60]

Explanation :

Magnetic field, B = 5.2 T

Electric field, E=4.6\times 10^4\ N/C

The directions of the two fields are perpendicular to each other. Hence the force due to each field will equate each other.

Electrostatic force, F =qE.........(1)

Magnetic force, F = qvB........(2)

From equation (1) and (2)

   E = v B

v=\dfrac{E}{B}

v=\dfrac{4.6\times 10^4\ N/C}{5.2\ T}

v=0.88\times 10^4\ m/s

v=8.8\times 10^3\ m/s

Hence, the correct option is (a).

(2) A permanent magnet always has two poles as the North pole and south pole. The magnetic field lines start from north poles and terminate at the south pole of the magnet.

Hence, the correct option is (C).

5 0
3 years ago
Sasha did an experiment to study the solubility of two substances. She poured 100 mL of water at 20 °C into each of two beakers
chubhunter [2.5K]

Answer:

b is the higher solubility then A

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3 years ago
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