1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
valentina_108 [34]
3 years ago
12

The speed of sound in an ideal gas is given by the relationship v = γRTM−−−−√ , where R - the universal gas constant = 8.314 J/m

ol⋅K ; T - the absolute temperature; M - the molar mass of the gas in kg/mol ; and γ is a characteristic of the specific gas. For air, γ = 1.4. Calculate the speed of sound in the air. Assume that air is 20% oxygen and 80% nitrogen and the temperature of air is 293 K . Express your answer to two significant figures and include the appropriate units.
Part B

While camping, you record a thunderclap whose intensity is 10−2 W/m2 . The clap reaches you 3.0 s after a flash of lightning. Assume that the thunder radiates spherically from its source. Estimate the total acoustical power generated by the bolt of lightning. Express your answer to two significant figures and include the appropriate units.
Physics
1 answer:
Anna71 [15]3 years ago
4 0

Answer:

Explanation:

1.) v=\sqrt{\frac{yRT}{m} } \\\\=\sqrt{\frac{1.4\times8.3\times293}{0.029} }\\\\=342.64m/s

2.) 4\pi r^2I=P\\\\\\P=4\pi(vt)^2I=4\pi (342.64\times3)^2(10^{-2})=1.33\times10^5watt

You might be interested in
Help quick<br> p;leaseeeeeeeeeeee its about direction and magnitude
KonstantinChe [14]

Explanation:

The net force of each square is the combination of the forces in each direction. The direction is the... direction the square would go in due to the net force. The magnitude of the net force is how large it is. So if you had a force pushing 2N to the left and 1N to the right, then the net force would be 1N to the left; because the two oppose eachother. If they were going in the same direction, then they'd add to each other. And perpendicular net forces (like one pushing up and another pushing left) can create net forces in diagonal directions.

I'm not going to do all of these for you because they're basically all the same thing and it's good practice for you anyway. But I'll do the first three just so you can get the idea:

1. The net force's magnitude is 4N and it's direction is to the right.

2. The net force's magnitude is 4N and it's direction is to the left.

3. The net force's magnitude is 0N and it has no direction because they are equal forces acting in opposite directions.

7 0
3 years ago
50POINTS! Find the orbital speed of a satellite in a circular orbit 1700km above the surface of the Earth. M_earth 5.97e24kg, r_
ivolga24 [154]
<h2>Answer: 7020.117 m/s</h2>

Explanation:

The velocity of a satellite describing a circular orbit is<u> constant</u> and defined by the following expression:  

V=\sqrt{G\frac{M}{R}} (1)  

Where:  

G=6.674({10}^{-11})\frac{N{m}^{2}}{{kg}^{2}} is the gravity constant

M_{Earth}=5.97{10}^{24}kg the mass of the massive body around which the satellite is orbiting, in this case, the Earth .

R=r_{Earth}+h=8080000m the radius of the orbit (measured from the center of the planet to the satellite).  

This means the radius of the orbit is equal to <u>the sum</u> of the average radius of the Earth r_{Earth} and the altitude of the satellite above the Earth's surface h.

Note this orbital speed, as well as orbital period, does not depend on the mass of the satellite. It depends on the mass of the massive body (the Earth).

Now, rewriting equation (1) with the known values:

V=\sqrt{(6.674({10}^{-11})\frac{N{m}^{2}}{{kg}^{2}})\frac{5.97{10}^{24}kg}{8080000m}}

V=7020.117\frac{m}{s}  

6 0
3 years ago
Read 2 more answers
2) Which of the following are examples of projectiles? Choose all that apply.
xeze [42]

Answer:

2,4,5 are the answers

Explanation:

sky diver suit, helicopter and feather hAVE an external force pushing or floating them

8 0
2 years ago
Why is it possible to remove a paper without moving the object on it.(apply newton's law)
klasskru [66]

This is possible due to inertia of motion. which is nothing but newton's first law.

according to this law , an object tries to retain its state of motion or rest unless acted upon by an external force.  

consider an object placed on a paper, initially both the object and paper are at rest. to pull the paper , we apply force on the paper and paper gains velocity. but the object keeps its motion of rest and hence the paper can be removed without moving the object.


7 0
3 years ago
More than 5 points and will pick brainliest answer plus I will give thanks❗️❕❗️(Don’t answer if you don’t know the answer)
Setler79 [48]
The answer is 2 and 3 because light bulbs dont produce uv rays and uv rays are very dangerous to people.
5 0
3 years ago
Other questions:
  • Evan drew a diagram to illustrate radiation. What do the arrows represent? gases mixing with particles liquid moving through a v
    7·2 answers
  • Electromagnetic waves with low frequencies have been used for long-distance underwater communication. These waves most likely be
    9·1 answer
  • What does force change?
    6·1 answer
  • In an electron dot diagram, the symbol for an element is used to represent
    12·2 answers
  • Need help in this question ???? Hurry please
    6·1 answer
  • An oscillator consists of a block of mass 0.628 kg connected to a spring. When set into oscillation with amplitude 27 cm, the os
    11·1 answer
  • What is the meaning of inertia?
    15·2 answers
  • Nonconjugated β,γ-unsaturated ketones are in base-catalyzed equilibrium with their conjugated α,β-unsaturated isomers. The mecha
    10·1 answer
  • Find the acceleration due to gravity on the surface of Mars. The
    6·1 answer
  • What is the meaning of the reference point in electric potential?.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!