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elixir [45]
3 years ago
5

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.2 kg and the sign has a mass of ms = 17

kg. The length of the beam is L = 2.48 m. The sign is attached at the very end of the beam, but the horizontal wire holding up the beam is attached 2/3 of the way to the end of the beam. The angle the wire makes with the beam is θ = 33.2°.
Physics
1 answer:
natka813 [3]3 years ago
6 0
What is the question in all of this?
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By what factor is the intensity of sound at a rock concert louder than that of a whisper when the two intensity levels are 120 d
77julia77 [94]

Answer:

The intensity of sound at rock concert is  10¹⁰ greater than that of a whisper.

Explanation:

The intensity of sound is given by;

I(dB) = 10Log(\frac{I}{I_o} )

where;

I is the intensity of the sound

I₀ is the threshold of sound intensity = 1 x 10⁻¹² W/m²

The intensity of sound at a rock concert

120 = 10Log(\frac{I}{1*10^{-12}} )\\\\12 = Log(\frac{I}{1*10^{-12}} )\\\\\frac{I}{1*10^{-12}} = 10^{12}\\\\I = 1*10^{-12} *10^{12}\\\\I = 1*10^0\\\\I =1 \ W/m^2

The intensity of sound of a whisper

20 = 10Log(\frac{I}{1*10^{-12}} )\\\\2 = Log(\frac{I}{1*10^{-12}} )\\\\\frac{I}{1*10^{-12}} = 10^{2}\\\\I = 1*10^{-12} *10^{2}\\\\I = 1*10^{-10}\\\\I =10^{-10} \ W/m^2

Thus, the intensity of sound at rock concert is  10¹⁰ greater than that of a whisper.

4 0
3 years ago
What is storage of energy​
Talja [164]

Hey,

Storage of energy is known as potential energy. If you take a spring for example, and you stretch it then you hold it, it has the energy you put into it but it is potential since it's not moving. Of course once you let go of it its potential energy turns into kinetic energy.

There are other examples as well, such as a battery. I decided to use the spring example because it is simpler.

I hope it helped.

I wrote all that^.

3 0
3 years ago
a student determines the circumference of a golf ball. a man pulls a sledge of mass 25 kg across level ground with a horizontal
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Explanation:

Fnet = Ft - Ff = 60N - 20N = 40N

a = Fnet / m = 40N / 25kg = 1.6m/s².

4 0
3 years ago
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Given the mass of the yo-yo is m and the length of the string (radius of the circle traced by the yo-yo) is L, you find the mome
Arlecino [84]
At condition 1:
I = mL^2
At condition 2:
I’ = m(2L)^2 = 4mL^2 = 4I
8 0
3 years ago
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Alexeev081 [22]

Answer:

This is the definition of slope.

Step-by-step explanation:

The formula for slope is:

m(slope) = (y2 - y1)/(x2 - x1)

This shows the difference in y, which is rise, divided by the different in x, or run.

3 0
4 years ago
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