What is the tangential speed of the plane?
a remote-controlled plane has a mass of 0.386 kg and flies in a circle with a radius of 75 m. the centripetal force on the plane is 4.0 n.
11 m/s
28 m/s
45 m/s
784 m/s

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

What happens to an isotope during radioactive decay?

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.