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3 years ago

When we touch things, how close do atoms get together? Or does anything touch anything else?? Full answer Please 50 - 100 words

2 answers:

8 0

Basically, we don't touch anything. We are always about an atom above the ground. The atoms in our body are very far apart. For example, if you made every atom in every human body touch then the whole earth's population could fit on a sugar cube. This is called the Pym law. The only reason I can't put my hand through the computer right now is since there is always one layer of electrons outlining our body. So the electrons stop us from falling into the center of the earth.

kkurt [141]3 years ago

3 0

Well, im pretty sure that when we do touch eachother, the atoms themselves are touching. idk if this is what ur looking for but hope this helps.

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3 years ago

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What is the magnitude of the momentum change of two gallons of water (inertia about 7.3 kg ) as it comes to a stop in a bathtub

aliya0001 [1]

We know that the change in momentum is equals to the product of force and time that is impulse ( $F \times t$ ). Therefore, we need to determine the value of that the water is in air by using the second equation of motion,

$s=ut+\frac{1}{2} gt^2$

Here, u is initial velocity which is zero.

$s= \frac{1}{2} gt^2 \\\\ t = \sqrt{\frac{2s}{g} }$ .

Thus, impulse

$= F \times \sqrt{\frac{2s}{g} }$

From Newton`s second law,

$F =mg$

Therefore, impulse

$= mg \times \sqrt{\frac{2s}{g} } = m \sqrt{2gs}$

Given, $m = 7.3 kg$ and $s = 2.0 m$

Substituting these values, we get

Change in momentum = impulse

$= 7.3 \ kg \sqrt{2 \times 9.8 \ m/s^2 \times 2.0 \ m } = 45 .7 \ Ns$ .

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