Pic of Bohr Model attached
To solve this problem we will apply the concepts related to the electric field, linear charge density and electrostatic force.
The electric field is

Here,
= Linear charge density
= Permittivity of free space
r = Distance
The linear charge density can be written as,
Linear charge density is given as

Replacing,


The initial and final electric Force can be written as function of the charge and the electric field as


If we replace the value for the electric field we have,

Length is one third at the end, then

The ratio of the force is


Therefore the required ratio is 3
Answer:
The answer is potential energy
Explanation:
The potential energy is the energy possessed by a body by virtue of it position
For example the water at the top of the dam is being held at a height h above the bottom of the dam
Then the potential energy
PE= weight of the water* the height
PE= m*g*h
Answer:
electrons are transferred from the wool shirt to the plastic rod is 4.375 ×
electrons
Explanation:
given data
Amount of charge transferred Q = -0.7 μC = -0.7 ×
C
electrons of charge e = -1.6 ×
C
solution
we apply formula here for total charge of electrons that is
Q = n × e ...................2
here n is no of electron that is
n =
put here value
n =
n = 4.375 ×
electrons
so here electrons are transferred from the wool shirt to the plastic rod is 4.375 ×
electrons
Answer:
Acceleration of the cart in the beginning is positive
Speed is positive when speeding up and slowing down.
Speed is zero when the cart stops.
Speed is negative when the cart speeds up in opposite direction.
Acceleration is negative when speeding up in opposite direction from rest.
Explanation:
When the cart is speeding up then its speed is increasing with time hence its acceleration is having a positive value.
- On speeding up the velocity is positive.
- On gradually decreasing the speed and coming to a stop the velocity is still positive with continuously decreasing magnitude until it reaches zero when the cart stops.
- When the cart speeds up in the opposite direction then the velocity of the cart becomes negative from zero and continuously increases in the negative value over a span of time hence its acceleration is also negative.