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3 years ago

Which is not a reason why the mass of an atom is expressed in atomic mass units rather than in grams?

Physics

2 answers:

satela [25.4K]3 years ago

6 0

Answer:

Ease of use and readability.

Explanation:

An atom of Oxygen, as an example, weighs 0.000...0001661 grams (with 23 zeros in front of "1661". In scientific notation this is written more concisely as

$1.661\cdot 10^{-24}g$

Still, in both cases the representation in units of grams is not easily readable and inconvenient to handle, especially when used in equations multiplying such mass with other measures. For this reason, the mass was agreed to be measured in atomic units, or a.u., which offer a numerically comparable baseline. An atomic unit for mass relates to the mass of an electron which is small enough to provide a good measurement unit. There are several variations to this so I recommend further reading if you need more detail.

TiliK225 [7]3 years ago

4 0

Scientists Could Not Agree On A Standard.

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Which of the following was not a factor that got the public interested in NASA? A. real people B. scientific reports C. adventur

fomenos

B. Scientific reports

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3 years ago

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What happens when the crests of two waves overlap

gregori [183]

Energy of the waves are redistributed to form a resultant wave with amplitude given by the summation of individual wave's amplitude.
If the two waves are of same frequency, speed and amplitude and travelling in opposite direction den stationary waves are form.

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3 years ago

About 65 million years ago an asteroid struck Earth in the area of the Yucatán Peninsula and wiped out the dinosaurs and many ot

9966 [12]

Answer:

$2.44156\times 10^{13}\ m^3$

29010.53917 m

Explanation:

$\rho$ = Density of asteroid = 2 g/cm³

V = Volume

d = Diameter = 10 km

r = Radius = $\dfrac{d}{2}=\dfrac{10}{2}=5\ km$

v = Velocity = 11 km/s

$H_v$ = Heat vaporization of water = $2.26\times 10^6\ J/kg$

$\Delta T$ = Change in temperature = 100-20

Mass is given by

$m=\rho V\\\Rightarrow m=\rho\dfrac{4}{3}\pi r^3\\\Rightarrow m=2000\dfrac{4}{3}\times \pi\times 5000^3\\\Rightarrow m=1.0472\times 10^{15}\ kg$

The kinetic energy is

$K=\dfrac{1}{2}mv^2\\\Rightarrow K=\dfrac{1}{2}1.0472\times 10^{15}\times 11000^2\\\Rightarrow K=6.33556\times 10^{22}\ J$

Heat is given by

$Q=mc\Delta T+mH_v\\\Rightarrow 6.33556\times 10^{22}=m\times (4186\times (100-20)+2.26\times 10^6)\\\Rightarrow m=\dfrac{ 6.33556\times 10^{22}}{4186\times (100-20)+2.26\times 10^6}\\\Rightarrow m=2.44156\times 10^{16}\ kg$

Mass of water is $2.44156\times 10^{16}\ kg$

Volume is $\dfrac{2.44156\times 10^{16}}{10^3}=2.44156\times 10^{13}\ m^3$

Amount of water is $2.44156\times 10^{13}\ m^3$

If it were a cube

$h=V^{\dfrac{1}{3}}\\\Rightarrow h=(2.44156\times 10^{13})^{\dfrac{1}{3}}\\\Rightarrow h=29010.53917\ m$

The height of the water would be 29010.53917 m

4 0

3 years ago

Which statement best compares an asteroid with Earth?

Alla [95]

Answer:

C) Both have rocky composition

Explanation

Earth has rocks. Many many rocks.

It is made of many type of rocks such as sedimentary, metamorphic, and igneous rocks. and guess what a asteroid is? That is right ! A ROCK.
A asteroid is normally made of stony silicate rocks , but not always , sometimes I can be diamonds!! The point is , they both are rocks floating around space.

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3 years ago

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Cuando habla una persona, ¿por qué identificas que se trata de un hombre,una mujer o un niño

Lubov Fominskaja [6]

Answer:

Lo ases por su voz

Explanation:

Creo ,,,,,,

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2 years ago