A200-m-wide river flows due east at a uniform speed of 2.0 m/s. a boat with a speed of 8.0 m/s relative to the water leaves the south bank pointed in a direction 30° west of north. what are the (a) magnitude and (b) direction of the boat’s velocity relative to the ground? (c) how long does the boat take to cross the river?

Explanation:

Given

Width of river=200 m

Speed of river=2 m/s

Speed of Boat relative to river=8 m/s

Boat leaves the bank west of north

Therefore velocity of boat w.r.t ground

Magnitude of boat speed

For direction

w.r.t to west

to cross the river its north component will help so

time taken

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.