Answer:
33.0 m
Explanation:
We are given that
Wavelength,![\lambda=550nm=550\times 10^{-9} m](https://tex.z-dn.net/?f=%5Clambda%3D550nm%3D550%5Ctimes%2010%5E%7B-9%7D%20m)
![1nm=10^{-9} m](https://tex.z-dn.net/?f=1nm%3D10%5E%7B-9%7D%20m)
Diameter of pupil=d=5.1 mm=![5.1\times 10^{-3} m](https://tex.z-dn.net/?f=5.1%5Ctimes%2010%5E%7B-3%7D%20m)
![1mm=10^{-3} m](https://tex.z-dn.net/?f=1mm%3D10%5E%7B-3%7D%20m)
![y=4.35 mm=4.35\times 10^{-3}m](https://tex.z-dn.net/?f=y%3D4.35%20mm%3D4.35%5Ctimes%2010%5E%7B-3%7Dm)
By Rayleigh criteria
![sin\theta=1.22\frac{\lambda}{d}](https://tex.z-dn.net/?f=sin%5Ctheta%3D1.22%5Cfrac%7B%5Clambda%7D%7Bd%7D)
![\frac{y}{L}=1.22\frac{\lambda}{d}](https://tex.z-dn.net/?f=%5Cfrac%7By%7D%7BL%7D%3D1.22%5Cfrac%7B%5Clambda%7D%7Bd%7D)
![L=\frac{yd}{1.22\lambda}](https://tex.z-dn.net/?f=L%3D%5Cfrac%7Byd%7D%7B1.22%5Clambda%7D)
Substitute the values
![L=\frac{4.35\times 10^{-3}\times 5.1\times 10^{-3}}{1.22\times 550\times 10^{-9}}](https://tex.z-dn.net/?f=L%3D%5Cfrac%7B4.35%5Ctimes%2010%5E%7B-3%7D%5Ctimes%205.1%5Ctimes%2010%5E%7B-3%7D%7D%7B1.22%5Ctimes%20550%5Ctimes%2010%5E%7B-9%7D%7D)
![L=33.0 m](https://tex.z-dn.net/?f=L%3D33.0%20m)
Answer:
In a permanent magnet, the magnetic field comes from the motion of the electrons inside the material, or, more precisely, from something called the electron spin. The electron spin is a bit like the Earth spinning on its axis. The magnetic field is a vector, the same way the electric field is.
Explanation:
Force of the kick or the balls velocity
Răspuns:
7: 4
Explicaţie:
Formula pentru calcularea cantității de căldură absorbită este exprimată ca;
Q = mc∆t
m este masa substanței
c este capacitatea termică specifică
∆t este schimbarea temperaturii
Conform legii calorimetriei, căldura pierdută de substanța rece = căldura câștigată de substanța fierbinte.
Folosind formula
(mc∆t) rece = (mc∆t) fierbinte
McCw∆tc = MhCw∆th
Deoarece au aceeași capacitate de căldură specifică, se vor anula. Ecuația devine;
Mc∆tc = Mh∆th ...... 1
Pentru apa rece;
∆tc = 45 ° C - 10 ° C
∆tc = 35 ° C
Pentru apa fierbinte:
∆th = 65 ° C - 45 ° C
∆th = 20 ° C
Înlocuiți în ecuația 1;
Mc (35) = Mh (20)
35Mc = 20Mh
Luând raportul dintre masa apei reci și cea fierbinte:
Mh / Mc = 35/20
Mh / Mc = 7/4
Prin urmare, lichidul trebuie amestecat împreună în raportul 7: 4
Answer:
441J
Explanation:
Given parameters:
Mass of book = 5kg
Height = 9m
Unknown:
Gravitational potential energy = ?
Solution:
The gravitational potential energy of a body is the energy due to the position of the body.
It is given as:
Gravitational potential energy = mass x acceleration due to gravity x height
Gravitational potential energy = 5 x 9.8 x 9 = 441J