Efficiency = (output / input) x 100
Efficiency = 54000/600
efficiency = 90%
Answer:
They create enormous amounts of sound energy, much like explosion. When an aircraft passes through air, it creates a series of pressure waves just like the waves created by the boat. As the speed of aircraft increases these waves are forced to compress.
Answer:
Length will be 0.491 nm
Explanation:
We have given wavelength of the photon ![\lambda =800nm=800\times 10^{-9}m](https://tex.z-dn.net/?f=%5Clambda%20%3D800nm%3D800%5Ctimes%2010%5E%7B-9%7Dm)
Plank's constant ![h=6.6\times 10^{-34}J-s](https://tex.z-dn.net/?f=h%3D6.6%5Ctimes%2010%5E%7B-34%7DJ-s)
We know that energy of the photon is given by
![E=\frac{hc}{\lambda }=\frac{6.6\times 10^{-34}\times 3\times 10^8}{800\times \times 10^{-9}}=2.475\times 10^{-19}J](https://tex.z-dn.net/?f=E%3D%5Cfrac%7Bhc%7D%7B%5Clambda%20%7D%3D%5Cfrac%7B6.6%5Ctimes%2010%5E%7B-34%7D%5Ctimes%203%5Ctimes%2010%5E8%7D%7B800%5Ctimes%20%5Ctimes%2010%5E%7B-9%7D%7D%3D2.475%5Ctimes%2010%5E%7B-19%7DJ)
We know that energy of photon is also given by
![E=\frac{n^2h^2}{8mL^2}=\frac{h^2}{8mL^2}](https://tex.z-dn.net/?f=E%3D%5Cfrac%7Bn%5E2h%5E2%7D%7B8mL%5E2%7D%3D%5Cfrac%7Bh%5E2%7D%7B8mL%5E2%7D)
![2.475\times 10^{-19}=\frac{(6.6\times 10^{-34})^2}{8\times 9.1\times 10^{-31}\times L^2}](https://tex.z-dn.net/?f=2.475%5Ctimes%2010%5E%7B-19%7D%3D%5Cfrac%7B%286.6%5Ctimes%2010%5E%7B-34%7D%29%5E2%7D%7B8%5Ctimes%209.1%5Ctimes%2010%5E%7B-31%7D%5Ctimes%20L%5E2%7D)
![L=0.491\times 10^{-9}m](https://tex.z-dn.net/?f=L%3D0.491%5Ctimes%2010%5E%7B-9%7Dm)
Albert Einstein created this equation. It means that the formula
shows that mass can be converted into energy, and energy can be converted into mass. Einstein made this equation 100+ years ago, and yes, he was right with the theory.
(Mark this as the brainliest if this answer helps!)