The answer is B: friction.
A definition of friction is a resistance of an object against another, for example a tire against mud, the tire would add friction against the mud to pull away from it.
I don’t need brainliest but please just mark thanks to this answer that would help me a lot, have a nice day :)
Answer:
6.38
Explanation:
line up the decimals
it helps to add another 0 to 2.6 so that you can align them better
1
2.60
+ 3.78
= 6.38
8 + 0 = 8
6 + 7 = 13; write 3 and carry the one over above the 2 in 2.60
2 + 3 + 1 = 6
I tried my best to show it through text.
Answer:
Hydroxide concentration of the sample is 1.3x10⁻⁶M
Explanation:
The equilibrium constant of water, Kw, is:
H₂O(l) ⇄ H⁺(aq) + OH⁻(aq)
Kw is defined as:
Kw = 1.7x10⁻¹² = [H⁺] [OH⁻]
As the sample is of pure water, both H⁺ and OH⁻ ions have the same concentration because come from the same equilibrium, that is:
[H⁺] = [OH⁻]
We can write the Kw expression:
1.7x10⁻¹² = [OH⁻] [OH⁻]
1.7x10⁻¹² = [OH⁻]²
1.3x10⁻⁶M = [OH⁻]
<h3>Hydroxide concentration of the sample is 1.3x10⁻⁶M</h3>
<span>crushing a can
</span><span>chopping wood
</span>shredding paper
It was the first continent, which later divided into 2, then more and more pieces, until we've got the continents of today.
Panthalassa was the ocean surrounding it those days.
