A box (FW = 20 N) is placed on a ramp with a 60° incline. Which of these is an expression for the component of the weight parallel to the ramp?

A. FW = 20 N × sin60°

B. FW = 20 N × cos60°

C. FW = 20 N × tan60°

D. FW = 20 N

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)