3 years ago

What does a notational analyst do

Physics

1 answer:

Mars2501 [29]3 years ago

6 0

Analyzes sports games in order to help coaches plan out strategy.

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What is the magnitude of the electric force between a proton and an electron when they are at a distance of 4.09 angstrom from e

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Answer:

$F=1.38*10^{-9}N$

Explanation:

According to Coulomb's law, the magnitude of the electric force between two point charges is directly proportional to the product of the magnitude of both charges and inversely proportional to the square of the distance that separates them:

$F=\frac{kq_1q_2}{d^2}$

Here k is the Coulomb constant. In this case, we have $q_1=-e$ , $q_2=e$ and $d=4.09*10^-10m$ . Replacing the values:

$F=\frac{8.99*10^{9}\frac{N\cdot m^2}{C^2}(-1.6*10^{-19}C)(1.6*10^{-19}C)}{(4.09*10^{-10})^2}\\F=-1.38*10^{-9}N$

The negative sign indicates that it is an attractive force. So, the magnitude of the electric force is:

$F=1.38*10^{-9}N$

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2 years ago

Which scientist began organizing elements into the periodic table?

Gre4nikov [31]

Answer:

B. Dmitri Mendeleev

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he invented it

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Scientists have differing views on the origin of the universe. One view suggests the universe is expanding everywhere at the sam

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Oscillating model is the right answer

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divide the mass value by 1e+8

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The speed of light is 3.0x10^5 km/sec and it takes light 1.3 seconds for light to travel from the moon to earth froim this infor

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The motion of the light is a uniform motion with constant speed $v=3 \cdot 10^5 km/s$ , therefore we can use the basic relationship between speed, space and time:
$v= \frac{S}{t}$ (1)
where S is the distance covered and t is the time taken. The light takes t=1.3 s to travel from the moon to Earth, therefore by rearranging eq.(1) we can find the distance between the Moon and the Earth:
$S=vt=(3 \cdot 10^5 km/s)(1.3 s)=390000 km=3.9 \cdot 10^5 km$

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2 years ago