An airplane pilot flies due west at a speed of 216 km/hr with respect to the air. after flying for a half an hour, the pilot finds themselves over a town that is 119 km west and 27 km south of their starting point. a- determine the magnitude of the velocity of the wind with respect to the ground.
(include units with the answer)
b-determine the direction of the velocity of the wind with respect to the ground measured as west from the south.
(include units with the answer)

What is the most useful equation for electric power?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)