. A proton, which moves perpendicular to a magnetic field of 1.2 T in a circular path of radius 0.080 m, has what speed? (qp = 1.6 · 10-19 C and mp = 1.67 · 10-27 kg)

Explanation:

We are given that

Magnetic field, B=1.2 T

Radius of circular path, r=0.080 m

We have to find the speed of proton.

We know that

Magnetic force, F=

According to question

Magnetic force=Centripetal force

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.