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salantis [7]
3 years ago
7

Which of the following would be an example of a vector? *

Physics
1 answer:
const2013 [10]3 years ago
8 0

Answer:

A person running 5m/s north

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Which ones are reactant chemicals?
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Salicylic acid and acetic anhydride are the reactants because the factories mix the two to form aspirin and acetic acid. 
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3 years ago
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
Explain how longitudinal waves and transverse waves are similar to each other and different from each other.
VashaNatasha [74]
Similar:
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For transverse waves, the waves move in perpendicular direction to the source of vibration.
For longitudinal waves, the waves move in parallel direction to the source of vibration .
They are similar in the sense that energy is transferred in the form of waves.
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Difference:
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Transverse Waves: Displacement of the medium is perpendicular to the direction of propagation of the wave.
Longitudinal Waves: Displacement of the medium is parallel to the direction of propagation of the wave.
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<span>v = 25.0 km/</span><span>h = 25*5/18 m/s = 6.94 m/s

</span><span>centripetal force = mv²/r = 1275*6.94²/40 = 1537.18 N </span>

4 0
4 years ago
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A constellation is _______ that forms a pattern resembling animals, mythological characters, or objects.
Svetradugi [14.3K]

A constellation is a group of stars.

Since human brains have evolved to look for patterns,
we sometimes seem to see patterns in groups of points. 
Different people make different pictures from the patterns ...
it depends on what they have on their mind.
 
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3 years ago
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