Student bikes to school by traveling first dn = 1.10 miles north, then dw = 0.300 miles west, and finally ds = 0.200 miles south.
part a
take the north direction as the positive y direction and east as positive x. the origin is still where the student starts biking. let d⃗ n be the displacement vector corresponding to the first leg of the student's trip. express d⃗ n in component form.

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.