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

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Select all the correct answers.which two statements are true? a moving magnetic field creates an electric field.a constant magnetic field creates an electric field.a constant electric field creates a magnetic field.a moving electric field creates a magnetic field.resetnext

Consider two regions of space containing a static electric field, region a and region b. in region a the equipotential lines are more closely spaced than those in region b. what can be said about the relative strength of the electric field in the two regions? a) the electric field in region a is stronger th