Answer:
1.364 m
Explanation:
We are given that
Frequency,f=110 MHz=![110\times 10^{6}Hz](https://tex.z-dn.net/?f=110%5Ctimes%2010%5E%7B6%7DHz)
![1MHz=10^6Hz](https://tex.z-dn.net/?f=1MHz%3D10%5E6Hz)
We have to find the distance between the nodal planes of the magnetic field.
We know that
Wavelength,![\lambda=\frac{c}{f}](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7Bc%7D%7Bf%7D)
Where c=![3\times 10^8m/s](https://tex.z-dn.net/?f=3%5Ctimes%2010%5E8m%2Fs)
Using the formula
![\lambda=\frac{3\times 10^8}{110\times 10^6}=2.727 m](https://tex.z-dn.net/?f=%5Clambda%3D%5Cfrac%7B3%5Ctimes%2010%5E8%7D%7B110%5Ctimes%2010%5E6%7D%3D2.727%20m)
Distance between nodal planes of the magnetic field
![d=\frac{\lambda}{2}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7B%5Clambda%7D%7B2%7D)
![d=\frac{2.727}{2}=1.364 m](https://tex.z-dn.net/?f=d%3D%5Cfrac%7B2.727%7D%7B2%7D%3D1.364%20m)
Answer: friction has no role to play in this case. because friction usually occurs between to parts which come in contacts. examples (a)our joints in the human body (b)two mechanical parts (shafts).
Explanation:
However what this topic relates to is gravity. The pebble and paper both weigh one gram, but have different density this is the sole reason why if both are drop from same height the pebble would reach the ground faster than the paper because it is more denser. unlike the paper with a lesser density which would take a longer time to reach the ground.
+10m/s²--25m/s
Explanation:
it's downward acceleration is +10ms-²
since it is falling freely under the influence of gravity
Since the elevator drops downward, that is initially from rest , u=0
so for this equation S=u + ½at²
but since u is 0 the new equation becomes S=½at²
thus from the new equation we determine the height attained after 2.5s during the fall
substituting 2.5s in the equation...
we get s to be 31.25m
then we substitute s in this equation when u=0 to get the velocity of the body
v²=u²+2as
v²=2as
v²=2(+10•31.25)
v²=625
v=25m/s
i suppose this will help