Answer:
coal and oil come from the remains of dead animals.
The answer is b_______________\\\
<u>Answer:</u> The wavelength of an electron is ![2.121\times 10^{-11}m](https://tex.z-dn.net/?f=2.121%5Ctimes%2010%5E%7B-11%7Dm)
<u>Explanation:</u>
To calculate the wavelength of a particle, we use the equation given by De-Broglie's wavelength, which is:
![\lambda=\frac{h}{mv}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bh%7D%7Bmv%7D)
where,
= De-Broglie's wavelength = ?
h = Planck's constant = ![6.626\times 10^{-34}Js](https://tex.z-dn.net/?f=6.626%5Ctimes%2010%5E%7B-34%7DJs)
m = mass of electron = ![9.109\times 10^{-31}kg](https://tex.z-dn.net/?f=9.109%5Ctimes%2010%5E%7B-31%7Dkg)
v = velocity of electron = ![3.43\times 10^{7}m/s](https://tex.z-dn.net/?f=3.43%5Ctimes%2010%5E%7B7%7Dm%2Fs)
Putting values in above equation, we get:
![\lambda=\frac{6.626\times 10^{-34}Js}{(9.109\times 10^{-31}kg)\times (3.43\times 10^{7}m/s)}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7B6.626%5Ctimes%2010%5E%7B-34%7DJs%7D%7B%289.109%5Ctimes%2010%5E%7B-31%7Dkg%29%5Ctimes%20%283.43%5Ctimes%2010%5E%7B7%7Dm%2Fs%29%7D)
![\lambda=2.121\times 10^{-11}m](https://tex.z-dn.net/?f=%5Clambda%3D2.121%5Ctimes%2010%5E%7B-11%7Dm)
Hence, the wavelength of an electron is ![2.121\times 10^{-11}m](https://tex.z-dn.net/?f=2.121%5Ctimes%2010%5E%7B-11%7Dm)
Answer:
Carbon
Explanation:
The non metal in the same group as Pb is carbon or C .
I hope this helps you.
<span>plants have multi-cellular haploid and multi-cellular diploid n <span>their life</span></span>