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wel
3 years ago
6

A typical lightning bolt has about 10.0 c of charge. how many excess electrons are in a typical lightning bolt?

Physics
2 answers:
alina1380 [7]3 years ago
5 0
The charge of an electron is -1.602 x 10^-19 Coulombs. If an average lightning bolt carries around 10.0 Coulombs of charge, we can simply divide this by the charge of an electron to estimate the total number of excess electrons:

(10.0 C) / (1.602 x 10^-19 C/electron) = 6.24 x 10^19 electrons
So there are around 6.24 x 10^19 excess electrons in a typical lightning bolt.
lubasha [3.4K]3 years ago
4 0

Answer:6.24\times 10^{19} electrons are present in the lightening bolt.

Explanation:

Total charge = -10.0 C

Charge on 1 electron = -1.602\times 10^{-19} C

Number of electrons = n

Total charge = n × charge on 1 electron

-10.0 C=n\times -1.602\times 10^{-19} C

n=\frac{-10.0 C}{-1.602\times 10^{-19} C}=6.24\times 10^{19} electrons

6.24\times 10^{19} electrons are present in the lightening bolt.

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An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature, this element is a very
Grace [21]

Answer:

12 neutrons

Explanation:

The number of protons also shows the atomic number. Therefore the element in question is Krypton (Kr), which also is a noble gas.

Neutrons = Mass number - protons - electrons

Here neutrons = 84 - 36 - 36 = 12

5 0
3 years ago
A year 11 pupil with a mass of 55kg swinging back on their chair and falling off it at a speed of 0.6m/s. What is his kinetic en
posledela

Answer:

Uk = 9.9 J

Explanation:

To calculate the kinetic energie (Uk), you can make use of this formula:

Uk = 0.5 * m * v²

given m = 55 kg and v = 0.6 m/s

Substituting in the formula gives:

Uk = 0.5 * 55 * (0.6)²

Uk = 0.5 * 55 * 0.36

Uk = 9.9 J

Extra:

Now let's examine the formula in relation to the SI units. <em>If you understand the following, it will give you great insight in how smart Phisics is inter twained by looking at formulas and their standard units. It will save you time in future to convert formulas, if you use the right standard units.</em>

The formula for kinetic energie is:

Uk = 0.5 * m * v²

Standard SI unit for mass m is kg.

Standard SI unit for speed v is m/s.

So v * v = v² and therefore v² must have the standard SI unit of m²/s².

From the formula, you see that the unit of Uk must be kg*m²/s² and since Uk is normally given in J, these both forms must be the same !

The main unit for Uk is the Joule. <em>Now</em><em> </em><em>please</em><em> </em><em>see</em><em> </em><em>the</em><em> </em><em>picture</em><em>,</em><em> </em><em>which</em><em> </em><em>shows</em><em> </em><em>the </em><em>relation</em><em> </em><em>between </em><em>the </em><em>J </em><em>and </em><em>other</em><em> SI units</em><em>.</em><em> </em><em>Please</em><em> </em><em>understand</em><em> </em><em>that</em><em> </em><em>you</em><em> </em><em>can</em><em> </em><em>construct</em><em> </em><em>your</em><em> </em><em>'own'</em><em> </em><em>formulas</em><em> </em><em>based</em><em> </em><em>these</em><em> </em><em>units</em><em>.</em><em> </em><em>Now</em><em> </em><em>here</em><em> </em><em>is</em><em> </em><em>the</em><em> </em><em>time</em><em> </em><em>saver</em><em>:</em>

Because almost always the right units are <em>given</em> in a question, or because sometimes you can look up a constant in a table with an exotic and seemingly complicated unit, but that says a lot about the formula which must have been some how involved!

<em>By this, I hope you now understand the implication of using the right standard SI units and how that can help you figure out what formula is needed.</em>

3 0
3 years ago
Assuming the speed of sound is 340 m/s, what is the most likely speed of the jet shown below?
inysia [295]

Well we know it has to be greater than 300,000 km/s since we can't see it.

We can't calculate it any closer than that using the given information.

7 0
3 years ago
HELP PLEASE
melisa1 [442]

answer:

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2 years ago
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bagirrra123 [75]

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