Answer:
c. metallic, sub metallic, or nonmetallic
The correct answer is Contact force:)
Answer:

Explanation:
Let m and e are the mass and charge of an electron. It is accelerated from rest through a potential difference V and are then deflected by a magnetic field that is perpendicular to their velocity. Let v is the velocity of the electron. It can be calculated as :


When the electron enters the magnetic field, the centripetal force is balanced by the magnetic force as :


or

So, the radius of the resulting electron trajectory is
. Hence, this is the required solution.
When you put ice in the freezer, the water expands when in gets cold.
the sidewalks have cracks in them to make room for the expansion and contraction when it heats up and cools down.
as you drive a car, the heat from combustion causes metal to expand. when you turn the car off, the metal cools down and contracts