C. isotope
Isotopes have the same atomic number but different mass number because of the difference in the number of neutrons in the nucleus of the atom.
The vacuum layer is the better thermal insulator
Explanation:
Depending on how they conduct heat, materials can be classified into two types:
- Thermal conductos: these are materials that are able to transfer heat efficiently. Examples of thermal conductors are metals in general: in fact, when you heat one side of a metal bar, the other end becomes hot very fast; this means that the heat has been transferred very quickly across the metal rod
- Thermal insulators: these are materials that do not transfer heat well. In general, gases or rarefied substances are better insulators, because the particles are more spread apart, and therefore the heat (which is transferred by conduction through collisions between molecules) is transferred less efficiently, due to the large distance between the particles.
In this sense, vacuum is the best possible insulator. This is because vacuum contains no particles at all, so there cannot be transfer of heat by conduction (because there cannot be collisions between molecules), and therefore, vacuum is the best thermal insulator.
Learn more about heat:
brainly.com/question/3032746
brainly.com/question/4759369
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Cell membrane. This is where chemicals enter and exit the cell.
By the de Broglie wavelength equation, the speed of proton is <u>0.47 × </u>
<u> m/s</u>.
λ = h / mv
λ = wavelength, given = 8.29 fm
h = plank's constant, given = 6.626 × 
m = mass, given = 1.672 × 
kg
v = velocity
Now, v = h / mλ
Put the values in formula, v = h / mλ
v = 0.47 × m/s
Therefore, the speed of proton is<u> 0.47 × </u><u> m/s</u>.
Learn more about de Broglie wavelength here:- brainly.com/question/15330461
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I hope it will help u!!!!!!!
Equator------------------C::::::::::::::
Latitude------------------B::::::::::::::
Longitude---------------A::::::::::::::
