Aproton travels with a speed of 4.2×106 m/s at an angle of 30◦ west of north. a magnetic field of 2.5 t points to the north. find the magnitude of the magnetic force on the proton. (the magnetic force experienced by the proton in the magnetic field is proportional to the component of the proton’s velocity that is perpendicular to the magnetic field.)

Explanation:

The magnitude of the magnetic force on the proton is given by:

where:

is the proton charge

is the proton velocity

is the magnetic field

is the angle between the direction of v and B

Substituting into the formula, we find

im not to sure what it is

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.