Two ships, a and b, leave port at the same time. ship a travels northwest at 15 knots and ship b travels at 20 knots in a direction 40° west of south. (1 knot = 1 nautical mile per hour) (a) what is the magnitude the velocity of ship a relative to b? knots (b) what is the direction of the velocity of ship a relative to b? ° east of north (c) after what time will the ships be 160 nautical miles apart? h (d) what will be the bearing of b (the direction of b's position) relative to a at that time? ° west of south

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply. the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a