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s2008m [1.1K]
3 years ago
13

When does sound become damaging to Human hearing?

Physics
1 answer:
wel3 years ago
4 0

Answer:

D) 250 decibels

Explanation:

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The Millennium Falcon was constructed 43.6 m long. a) How fast is it traveling past Luke when he measures its length to be 30.1
Zinaida [17]

Answer:

a)0.5564c

b)43.6 m

Explanation:

Given proper length of falcrum L₀= 43.6 m

improper length L=30.1 m (when viewed from moving frame)

we know that L=L_{0}\sqrt{1-\frac{v^2}{c^2}}

30.1=43.6\sqrt{1-\frac{v^2}{c^2}

⇒\{1-\frac{v^2}{c^2}}=\frac{30.1}{43.6}

{1-\frac{v^2}{c^2}}=0.6904

\frac{v^2}{c^2}=0.3096

v^{2}=3096c^{2}

v=0.5564c

this is the required speed of falcon when it passes luke

b). Since Han solo is on the Falcon its reference frame will be falcon itself hence there wont be any change in the length of Falcon that its length will be

43.6 m

8 0
3 years ago
Due to the intense heat and pressure on the inner core, scientists believe it is a A.solid B.liquid C.semi-fluid D.gas
nexus9112 [7]
The Answer Is Solid, But The Inner Core Is Surrounded By A Liquid Outer Core
Hope This Helps
3 0
3 years ago
Read 2 more answers
What is the mass of an object traveling at 20 m/s with a kinetic energy of 4000 J?<br>​
valentinak56 [21]

Answer:

20 kg

Explanation:

Kinetic energy=½*Mass * velocity²

4000= ½* m*20²

8000=400m

m=8000/400

m=20 kg

5 0
3 years ago
A list of heat transfer examples are listed below. Which is NOT an example of convection?
Alex777 [14]

Answer:

C. Hot pavement burning your feet

Explanation:

Convection is a type of process where heat travels upwards and cold travels downwards.

7 0
3 years ago
The scale on the horizontal axis is 9 s per division and on the vertical axis 9 m per division
igomit [66]

Answer:

27

Explanation:

X axis says any of its values should be multiplied by 9sec. So you would multiply 3 and 9 which gets you 27. Pretty Easy.

5 0
4 years ago
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