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Ratling [72]
3 years ago
7

The distance from the sun to Earth would be

Physics
1 answer:
Alchen [17]3 years ago
5 0

less than one light year!

Explanation:

i took the test it is correct mark me brainiest pls!

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Help meeeeeeeeeeee<br>what is the rheostat and what its ruleeee??​
andre [41]

Answer:

<h2><u>Rheostat:</u></h2>

=> Rheostat is an electric device used as a variable resistance, like the regulator of the fan. It is used to change the electric resistance in the electric circuit.

<h2><u>Principle / Rule:</u></h2>

=> Rheostat works on the principle of Ohm’s law. Ohm’s law states that current in a circuit is inversely proportional to the resistance at the given temperature.

\infty  \infty  \infty

8 0
3 years ago
The beautiful Multnomah Falls in Oregon are approximately 206m high. If the Columbia river is flowing horizontally at 2.90m/s ju
zhenek [66]

Answer:

The overall velocity of the water when it hits the bottom is:

v_f=63.61\ \frac{m}{s}

Explanation:

Use the law of conservation of energy.

Call it instant [1] to the moment when the water is just before reaching the falls.

At this moment its height h is 206 meters and its velocity  horizontally v_i is v_i = 2.90m/s.

At the instant [1] the water has gravitational power energy E_g

E_g = mgh

The water also has kinetic energy Ek.

E_k = 0.5mv_i ^ 2

Then the Total E1 energy is:

E_1 = mgh + 0.5mv_i ^ 2

In the instant [2] the water is within an instant of touching the ground. At this point it only has kinetic energy, since the height h = 0. However at time [2] the water has maximum final velocity v_f

So:

E_2 = 0.5mv_f ^ 2

As the energy is conserved then E_1 = E_2

mgh + 0.5mv_i ^ 2 = 0.5mv_f ^ 2

Now we solve for v_f.

gh + 0.5v_i ^ 2 = 0.5v_f ^ 2\\\\9.8(206) + 0.5(2.90) ^ 2 = 0.5v_f 2\\\\v_f^2 = \frac{9.8(206) + 0.5(2.90) ^ 2}{0.5}\\\\v_f = \sqrt{\frac{9.8(206) + 0.5(2.90) ^ 2}{0.5}}\\\\v_f=63.61\ \frac{m}{s}

7 0
3 years ago
Precautions that should be taken when using a light microscope​
Crazy boy [7]

Answer:

b

Explanation:

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3 years ago
Through what media does mechanical waves move
Aleks [24]
A mechanical wave moves through all matter
6 0
3 years ago
Why heat capacity for polymer higher than metal?
jok3333 [9.3K]
Because polymers are covalently bonded material, and metals are metalicly bonded material. 

Covalent bonds do not let atoms exchange electrons like metalic bonds do.
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4 years ago
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