A long-distance runner out for a workout runs 4 kilometers in 20 minutes, walks for a distance of 1 kilometer, which takes 10 minutes, and then rests in one spot for 10 minutes. After that, she runs
another 6 kilometers in 35 minutes. Which of the following are true with respect to her motion?

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?