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sineoko [7]
3 years ago
14

What objects can be seen from earth because they producde there own light? 

Physics
1 answer:
Lena [83]3 years ago
7 0

- neon signs
- fireworks
- rockets during the ascent
- meteors
- fireflies
- stars
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Where should you place an object on the principal axis in front of a convex mirror to get a virtual, upright, and smaller image?
dalvyx [7]
By definition, a convex mirror is a type of an optical mirror wherein its mirror surface bulges at the front. In addition to that, it is contrary to the concave mirror wherein the mirror gets bulged inward. It is furthermore said that we can get a virtual, upright, and smaller image in a convex mirror if it is placed anywhere in the principal axis. 
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3 years ago
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What is the wavelength of a sound wave with a frequency of 770 Hz if it speed is 290 m/s?
Studentka2010 [4]

The wavelength of sound wave with frequency 770 Hz and speed of 290 m/s is equal to 0.3767 m

<h3>Explanation:</h3>

The wave equation determining the relationship between speed, frequency and wavelength of a sound wave is given by:

<u>Speed of sound = Frequency of sound × Wavelength of sound wave</u>

v = n × λ .................................(1)

Given:

v = Speed of sound wave = 290 m/s

n = Frequency of sound = 770 Hz

λ = Wavelength = ?

From (1)

v = n × λ

Rewriting the equation for λ, we get

λ = \frac{v}{n}

Substituting the values of v and n, we get

λ = \frac{v}{n} =\frac{290}{770} = 0.3767 \ m

Hence, the wavelength of sound wave is equal to 0.3767 m

7 0
3 years ago
Neptune's largest satellite is named WHAT and revolves in a WHAT orbit.
Rom4ik [11]
Neptune's largest satellite is Triton, and it revolves in a retrograde orbit, meaning to opposite of Neptune's totation<span />
4 0
3 years ago
The wavelength of a waterwave is 4.0 X 10^2 m. The wave approaches land at 25 m/s what is the period of the wave?
Elodia [21]
The right answer is 72
3 0
3 years ago
A thin-walled vessel of volume V contains N particles which slowly leak out of a small hole of area A. No particles enter the vo
LuckyWell [14K]

Answer:

    \frac{V}{2av}

Explanation:

From the question we are told that

Volume V

Contains N particles

Leaks from a small hole of area A

Generally the equation for Flow rate is given as

Volume Flow Rate  V_r = A * v

Mathematically we find the  time taken to flow half way which is given by

          \frac{(V/2)}{A*v}

Therefore the  time taken is

           \frac{V}{2av}

7 0
3 years ago
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