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Vsevolod [243]
3 years ago
12

An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with differen

t accelerations. This is an example best described by
Newton's First Law

Newton's Second Law

Newton's Third Law

Answer
Chemistry
1 answer:
lisabon 2012 [21]3 years ago
8 0
<h3>Answer:</h3>

Newton's Third Law

<h3>Explanation:</h3>
  • According to Newton's third law of motion, for every action there is an equal; and opposite reaction.
  • According to this law, if an object Y exerts a force on another object X, then object X exerts a force that is equal in magnitude but opposite on object Y.
  • Therefore, in this case, the action is the push by the ice skater against a sled at rest then the reaction is both the skater and sled moving away from each other at different accelerations.
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<img src="https://tex.z-dn.net/?f=H_2PO_4%5E-%28aq%29%20%5Crightarrow%20H%5E%2B%28aq%29%20%2B%20HPO_4%5E%7B2-%7D%28aq%29" id="Te
klasskru [66]

Answer:

The pH of the buffer solution = 8.05

Explanation:

Using the Henderson - Hasselbalch equation;

pH = pKa₂ + log ( [HPO₄²-]/[H₂PO4⁻]

where pKa₂ = -log (Ka₂) = -log ( 6.1 * 10⁻⁸) = 7.21

Concentration of OH⁻ added = 0.069 M (i.e. 0.069 mol/L)

[H₂PO4⁻] after addition of OH⁻ = 0.165 - 0.069 = 0.096 M

[HPO₄²-] after addition of OH⁻ = 0.594 + 0.069 = 0.663 M

Therefore,

pH = 7.21 + log (0.663 / 0.096)

pH = 7.21 + 0.84

pH = 8.05

4 0
3 years ago
I need help please, thanks!
oee [108]

Answer:

This question is somehow not clear, because a typical human eye can notice objects which have wavelengths from about 380 to 740 nanometers. This is called visible spectrum (the portion of the electromagnetic spectrum that is visible to the human eye). Electromagnetic radiation in this range of wavelengths is called visible light or simply light.

Someone even can see extra colors - they able to see beyond the visible spectrum. The reason that the human eye can see the spectrum is because those specific wavelengths stimulate the retina in the human eye. The human retina can only detect incident light that falls in waves from about 380 to 740 nanometers long, so we can’t see microwave or ultraviolet wavelengths. This also applies to infrared lights which has wavelengths longer than visible and shorter than microwaves, thus being invisible to the human eye.

In conclusion, the human eye can not notice that objects with wavelength not in the range of 380 to 740 nanometers.

Explanation:

5 0
3 years ago
What is the mass of a liter of water?
kumpel [21]

Answer:

one kilogram is the answer

8 0
3 years ago
How is data not actually obtained from the experiment represented in a line graph?
vfiekz [6]

Answer:

with a double line

8 0
4 years ago
Please help y’all I don’t understand
VashaNatasha [74]

Answer:

D.

Explanation:

You try to get 8 electron on the outermost "shell" so you have no left over or "valence" electrons.

6 0
3 years ago
Read 2 more answers
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