Answer:
Velocity of the electron = v = 1.2\times 10^8\ m/s.
Explanation:
Given,
- Mass of the electron =

- Charge on the electron =

- Charge density of the ring =

- Radius of the ring = R = 0.70 m
- Distance between the electron ant the center or the ring = x = 0.5 m
Now total charge on the ring = 
Potential energy due to the charged ring to the point on the x-axis is

Let v be the velocity of the electron at the center of the ring.
Total kinetic energy of the electron = 
Now, From the conservation of energy,
the total potential energy of the electron at initially is converted to the total kinetic energy of the electron at the center of the ring,

Hence the velocity of the electron on the center of the charged ring is 
atom ................................................... sorry for the periods
Answer:
t = 5.89 s
Explanation:
To calculate the time, we need the radius of the pulley and the radius of the sphere which was not given in the question.
Let us assume that the radius of the pulley (
) = 0.4 m
Let the radius of the sphere (r) = 0.5 m
w = angular speed = 150 rev/min = (150 × 2π / 60) rad/s = 15.708 rad/s
Tension (T) = 20 N
mass (m) = 3 kg each


Substituting values:

All the radiation from stars is the result of nuclear fusion in their cores.
Answer:
2354.4 Pa
40221 Pa
Explanation:
= Density = 1000 kg/m³
g = Acceleration due to gravity = 9.81 m/s²
h = Depth
The pressure difference would be

The pressure difference in the first case is 2354.4 Pa

The pressure difference in the second case is 40221 Pa