Answer:
The radius is 
Explanation:
The problem states that
The magnetic field is 
The electron kinetic energy is 
In general, for a collision to happen, the centripetal force on the electron in its orbit must equal the magnetic force acting on it
This can be mathematically expressed as
=> 
Where m denotes the electron’s mass, which has a value of 
v signifies the escape velocity, mathematically represented as
Thus,
applying indices
substituting these values
Answer:
1.2 × 10^27 neutrons
Explanation:
Considering one neutron weighs 1.67 × 10^-27 kg,
the count of neutrons in a 2 kg mass would be computed as:
2 ÷ 1.67 × 10^-27
Hence, there are approximately 1.2 × 10^27 neutrons.
Inside the hollow plastic ball, there is no electric field present. According to Gauss's law, the electric field at a closed Gaussian surface is determined by the charges enclosed within it. To assess the electric field inside, we consider a spherical Gaussian surface inside the ball. Since all charge is located on the surface of the sphere, this Gaussian surface encloses no charge at all; thus, per Gauss's law, the result is that the electric field remains zero.
