you are in a boat that has a river current going downstream at 3.5 m/s (whitewater/kayak speeds). there is a wind that is blowing you to one side at an angle of 85 w. r.t to downstream at a speed of 0.8 m/s (strong winds). what is the total velocity of the boat?

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Which of these metals are magnetic?