<span>Spring tides occur twice a month because the Sun and Moon are on same side of Earth and also when both are opposite side of of Earth.</span>
Answer:
Explanation:
Given
-- radius of hydrogen atom
<em>See attachment</em>
Required
Determine the radius of magnesium atom (R)
From the attachment, the ratio of a hydrogen atom to a magnesium atom is:
Simplify
Represent the radius as ratio:
Substitute
Equate both ratios
Express as fraction
Cross Multiply
Hence, the radius of the magnesium atom is: 
The evidence that astronomers use to prove jets travel in opposite direction is Spectral lines from a very fast moving ionized gases.
<h3>Who are the astronomers?</h3>
Astronomer is a person who study astronomy which is a scientific study that has to do with space, space bodies, comets, planets, stars and so on.
Therefore, The evidence that astronomers use to prove jets travel in opposite direction is Spectral lines from a very fast moving ionized gases.
Learn more about astronomers below.
brainly.com/question/10826203
#SPJ11
Aerodynamic is relating to reduces the drag from air moving past
Resistivity is material property. It depends only on temperature. For the same material with different length and area, resistivity remains the same until temperature remains constant.
<h3>HOPE IT HELPS YOU......</h3>
MARK MY ANSWER AS BRAINLIEST
