Answer:
<em>Reason:- We use cotton to make the wick of a spirit lamp because cotton has thread strands which act like fine capillaries and help in drawing up a steady supply of oil in the lamp for burning by capillary action</em>
Explanation:
Answer:
A. Drag
Explanation:
This is because, since friction tends to oppose the motion of an object, and drag affects an object moving in a fluid, the more the friction, the more the drag on the object.
Two examples of mutagens would be radiation mutagens and chemical mutagens. Hope this helps!
Answer:
The wavelength is ![5.591\times10^{-15}\ m](https://tex.z-dn.net/?f=5.591%5Ctimes10%5E%7B-15%7D%5C%20m)
Explanation:
Given that,
Speed ![v= 7.1\times10^{7}\ m/s](https://tex.z-dn.net/?f=v%3D%207.1%5Ctimes10%5E%7B7%7D%5C%20m%2Fs)
Mass of proton ![m= 1.67\times10^{-27}\ kg](https://tex.z-dn.net/?f=m%3D%201.67%5Ctimes10%5E%7B-27%7D%5C%20kg)
We need to calculate the wavelength
Using formula of de Broglie wavelength
![p=\dfrac{h}{\lambda}](https://tex.z-dn.net/?f=p%3D%5Cdfrac%7Bh%7D%7B%5Clambda%7D)
![\lambda=\dfrac{h}{p}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cdfrac%7Bh%7D%7Bp%7D)
![\lambda=\dfrac{h}{mv}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cdfrac%7Bh%7D%7Bmv%7D)
Put the value into the formula
![\lambda=\dfrac{6.63\times10^{-34}}{1.67\times10^{-27}\times7.1\times10^{7}}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cdfrac%7B6.63%5Ctimes10%5E%7B-34%7D%7D%7B1.67%5Ctimes10%5E%7B-27%7D%5Ctimes7.1%5Ctimes10%5E%7B7%7D%7D)
![\lambda=5.591\times10^{-15}\ m](https://tex.z-dn.net/?f=%5Clambda%3D5.591%5Ctimes10%5E%7B-15%7D%5C%20m)
Hence, The wavelength is ![5.591\times10^{-15}\ m](https://tex.z-dn.net/?f=5.591%5Ctimes10%5E%7B-15%7D%5C%20m)