Water is a compound because it A. cannot be broken down into simpler substances. B. always has two hydrogen atoms for each oxyge
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
A compound is defined as a substance in which two or more different elements in a fixed ratio by mass combine chemically with each other.
For example, chemical formula of water is and it is a compound because here two atoms of hydrogen chemically combine with one atom of oxygen.
And, the ratio of these atoms is 2 : 1. A compound can be broken down into simpler substance by chemical means only.
Whereas an element is a substance that contains only same type of atoms that cannot be broken down into simpler substances.
Thus, we can conclude that water is a compound because it always has two hydrogen atoms for each oxygen atom.
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The third equation of free fall can be applied to determine the acceleration. So that Paola's acceleration during the flight is 39.80 m/.
Acceleration is a quantity that has a direct relationship with velocity and also inversely proportional to the time taken. It is a vector quantity.
To determine Paola's acceleration, the third equation of free fall is appropriate.
i.e =
± 2as
where: V is the final velocity, U is the initial velocity, a is the acceleration, and s is the distance covered.
From the given question, s = 20.1 cm (0.201 m), U = 4.0 m/s, V = 0.
So that since Poala flies against gravity, then we have:
=
- 2as
0 = - 2(a x 0.201)
= 16 - 0.402a
0.402a = 16
a =
= 39.801
a = 39.80 m/
Therefore Paola's acceleration is 39.80 m/.
It is determined by the nature of the green light. Because lasers create light at almost a single frequency, green laser light would appear as a thin line of pure green. Other sources of "green" light emit light at a variety of frequencies, including yellow and blue, resulting in a strong green band in the center that fades into blue-green and yellow-green at the borders.
For example, here’s a graph of the spectrum of a green LED, showing the color range: Attachment #1
and here’s a graph of the transmission spectra of several standard photographic filters, including green: Attachment #2
Learn more about the color spectrum:
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