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prisoha [69]
3 years ago
6

The element carbon exists in several different forms. Pure carbon can be found in the form of diamonds, coal, and the graphite i

n your pencil. Which statement concerning carbon is FALSE? A) All carbon atoms have 6 protons. B) All carbon atoms have 6 neutrons. C) All carbon atoms have an atomic mass equal to the number of protons and neutrons. Eliminate D) All carbon atoms have an atomic number of 6.
Physics
2 answers:
Artist 52 [7]3 years ago
5 0
B is false.

not all carbon atoms have 6 neutrons. Carbon 13 for example has 7 neutrons
goldenfox [79]3 years ago
4 0

Answer:

B)

Explanation:

As stated in A): The number of protons in ANY element is the same.

But, the atomic mass may be different, and the reason for this, is a change in the number of <em>neutrons. </em>

C) is true, because the atomic mass of any atom is equal to the number of protons and neutrons.

D) is true, as said before: The number of protons in ANY element is the same. And the atomic number of any atom is equal to the number of protons.

<em />

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WOULUJUTUL RECIPECUIUS.
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The force between the two objects is 19.73 nN.

<u>Explanation: </u>

Any force acting between two objects tends to be directly proportional to the product of their masses and inversely proportional to the square of the distance between the two objects. And this kind of attraction force between two objects is termed as gravitational force.

So if we consider M_{1} and M_{2} as the masses of both objects and let d be the distance of separation of two objects. Then the force between the two objects can be determined as below:

                      \text {Gravitational force}=\frac{G \times M_{1} \times M_{2}}{d^{2}}

As gravitational constant G=6.67 \times 10^{-11} \mathrm{m}^{3} \mathrm{kg}^{-1} \mathrm{s}^{-2}, M_{1} = 20 kg and  M_{2} = 100 kg, while d = 2.6 m, then

                    \text {Gravitational force}=\frac{6.67 \times 10^{-11} \times 20 \times 100}{(2.6)^{2}}=\frac{6.67 \times 20 \times 10^{-9}}{6.76}

Thus, we get finally,

                   \text {Gravitational force}=19.73 \times 10^{-9} \mathrm{N}

As we know, nano denoted by letter 'n' equals to 10^{-9}

So the force acting between two objects is 19.73 nN.

7 0
3 years ago
How does an ocean wave transfer energy across the ocean?
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3 years ago
PLEASE HELP ME WITH MY HOMEWORK!!!!!
IgorC [24]

Known :

l = 7 cm

w = 4 cm

Asked :

h = ...?

Answer :

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