An electron is launched with velocity v→ in a uniform magnetic field B→. The angle θ between v→ and B→ is between 0 and 90o. As a result, the electron follows a helix, its velocity vector v→ returning to its initial value in a time interval of

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2