Answer:
Plasma
Explanation:
For a fusion reaction to take place, there must be conditions in which the particles have extreme thermal kinetic energies, in this way the collisions that cause the nuclear fusion are generated. Therefore, it is necessary to reach very high temperatures, in which the state of matter will necessarily be plasma.
Light is faster. Humans can travel faster than sound, however not light- nothing seems to go faster than 3×10∧8 meters per second.
The Lorentz force acting on the proton is equal to:

where
q is the proton charge
v is the proton speed
B is the intensity of the magnetic field

is the angle between the direction of v and B
since the proton travels perpendicularly to the magnetic field, in this case

, so the Lorentz force in this case is simply

The magnetic force provides also the centripetal force that keeps the proton in circular motion:

where
m is the proton mas
r is the radius of the orbit
If we re-arrange this equation and we use the data of the problem, we can find the radius of the orbit:
Answer:
Energy
A medium
Explanation:
A wave is a disturbance that travels through a medium, transferring energy from one point to another in the medium.
Mechanical waves are waves that require a medium for their propagation.
Most Likely Answer:
It cannot be determined without knowing the mass of the sphere.