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Basile [38]
3 years ago
6

Explain why the atomic mass of an element is a weighted-average mass

Physics
1 answer:
Sliva [168]3 years ago
3 0
The isotopes contribute to the average atomic mass based on their abundance. The result is that the "average" mass for the atoms of an element is dictated by the most abundant or common isotope. The average atomic mass for carbon is 12.0107 amu. The atomic mass as displayed on the periodic table is a weighted average relative atomic mass of the naturally occuring isotopes of that element. An isotope is an element with the same number of protons but a different number of neutrons For example - Carbon naturally occurs in isotopes C12, C13 and C14 with abundances of 98.9% 1.1% and 'trace' respectively. the average mass is then calculated by 12*98.9%+13*1.1% = 12.01g/mol
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A 15-µF capacitor and a 25-µF capacitor are connected in parallel, and charged to a potential difference of 60 V. How much energ
Alborosie

Answer:

Energy stored, E = 0.072 J

Explanation:

Given that,

Capacitance, C_1=15\ \mu F

Capacitance, C_2=25\ \mu F

These two capacitor are connected in parallel, and charged to a potential difference of, V = 60 volts

We know that in parallel combination of capacitor, the equivalent capacitance is given by :

C=C_1+C_2\\\\C=(15+25)\ \mu F\\\\C=40\times 10^{-6}\ F

The energy stored in the capacitor is given by :

E=\dfrac{1}{2}CV^2\\\\E=\dfrac{1}{2}\times 40\times 10^{-6}\times (60)^2\\\\E=0.072\ J

So, the energy stored in the capacitor in this capacitor combination is 0.072 J.

4 0
3 years ago
Helpppppppppppp.......!
Black_prince [1.1K]

Explanation:

m = 66 kg

a = 2 m/s²

F = .....?

<h3>F = m . a</h3>

= 66 . 2

= 132 N

<h3>#CMIIW</h3>

3 0
3 years ago
Which fundamental force is very strong across a short distance?
lesya692 [45]

B. Strong nuclear

Because the strong nuclear force is the strongest at short distances, it dominates over the other forces and the two protons become bound, forming a helium nucleus (typically a neutron is also needed to keep the helium nucleus stable).

5 0
3 years ago
Read 2 more answers
ASAP PLEASE! WILL GIVE BRAINLIEST ANSWER! The pictures below show the wavelengths and intensities of electromagnetic radiations
rjkz [21]

As per Weins displacement law the wavelength of light for which we get the peak of the graph is always inversely proportional to the temperature.

So we can say

/lambda = \frac{b}{T}

So here if temperature becomes more cool then wavelength will increase

here we know that

\lambda_1 = 8500 A^o

\lambda_2 = 6000 A^o

\lambda_3 = 3500 A^o

It means the hottest star out of all three is star 3

and coolest star is star 1

now if we star 2 becomes cooler then it means its temperature will go near to star 1 and hence it will more look like to star 1.

So correct answer is

it will look more like Star 1

6 0
3 years ago
Please help on this one?
pashok25 [27]

Answer:

B) It is connected in parallel and measures potential differences.

Explanation:

A voltmeter measures electrical potential differences between two points in an electric circuit. It is also connected in parallel to measure a device's voltage, while an ammeter is connected in series to measure a device's current.

Hope this helps! :)

7 0
3 years ago
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