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Elan Coil [88]
3 years ago
11

Pls help I will mark

Physics
1 answer:
Paraphin [41]3 years ago
3 0
Metals contain the most and semiconductors contain the least amount. Hope this helps.
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The power output of a tuba is 0.35 W. At what distance is the sound
STALIN [3.7K]

The distance of the sound from the tuba is 4.82 m.

<h3>Area of the tube</h3>

The area of the tuba is calculated as follows;

I = P/A

where;

  • I is intensity of sound
  • P is power
  • A is area

A = P/I

A = 0.35 / (1.2 x 10⁻³)

A = 291.67 m²

<h3>Distance of the sound</h3>

Area = 4πr²

r = \sqrt{\frac{A}{4\pi} } \\\\r = \sqrt{\frac{291.67}{4\pi} } \\\\r = 4.82 \ m

Thus, the distance of the sound from the tuba is 4.82 m.

Learn more about intensity of sound here: brainly.com/question/4431819

8 0
3 years ago
A pole that is 2.9m tall casts a shadow that is 1.32m long. at the same time, a nearby tower casts a shadow that is 37.75m long.
Mrrafil [7]
\frac{2.9}{1.32}   = \frac{x}{37.75}

x = 82.93 m

Nothing to deal with physics.
Maths. Scale factor. Year 9.
5 0
3 years ago
A bicycle has a momentum of 36 kg* m/s and a very!I city of 4 m/s.What is the mass of the bicycle?
Strike441 [17]

p = 36 kgm/s

v = 4m/s

we know that,

p = mv

so,

m =  \frac{p}{v}

m  =  \frac{36}{4}

m = 9kg

8 0
3 years ago
During the early 1800s, these professionals regularly appeared in court to answer questions related to physical evidence.
-Dominant- [34]

Answer: Forensic science

In early 1800s, the professional investigators regularly attend court trial to answer questions related to physical evidence, which is described as forensic science. The study of physical evidence is a practical tool to assist police in conducting investigations by developing a sense of how the crime was committed. Therefore, the application of forensic science is a great help in solving crime.

8 0
4 years ago
Read 2 more answers
Where did the carbon in all living things come from?
Maru [420]
D (it was produced by cyanobacteria)!!!
3 0
3 years ago
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