Answer:

Explanation:
The Rydberg formula can be extended for use with any hydrogen-like chemical elements, that is to say with only one electron being affected by effective nuclear charge. So, in this case, we can calculate the wavelenghts of the emitted photons using this formula:

Where R is the Rydberg constant of the element, Z its atomic number,
is the lower energy level and
the upper energy level of the electron transition. Recall that the ground state is denoted as n=1.

<u>Analysing the Question:</u>
We know that equilibrium is the state of a body when it has equal and opposite forces being applied on it
In this case, a net downward force of 496N is being applied and a net upward force of (106 + 106 + 142 + x) N
<u>Finding the missing force:</u>
Since we have to achieve equilibrium, the net upward forces have to be equal to the net downward forces
So, (106 + 106 + 142 + x) = 496
354 + x = 496
x = 496 - 354
x = 142 N
Therefore, the missing force is 142 N
Answer:

Explanation:
We are given that
Radius,r=2 m
Moment of inertia,I=250
Angular velocity,
Mass of child,m=20 kg
We have to find the new moment of inertia of the merry go round.
New moment of inertia ,
Using the formula


Hence, the new moment of inertia of the merry -go-round=
Answer:
Explanation:
According to the Fleming's right hand rule, if we spread our right hand such that the thumb, fore finger and the middle finger are mutually perpendicular to each other, then the thumb indicates the direction of force, fore finger indicates the direction of magnetic field, then the middle finger indicates the direction of induced current.
According to the Lenz's law, the direction of induced emf is such that it always opposes the cause due to which it is produced.
Maximum torque.
T=F.r
r is measured from point of turning, which is the hinge. r is maximum when the handle is at the free edge.