A 2kg object is moving with speed 5ms. then hits a wall in 0.5s before reversing its direction with a speed of 2ms
a. Calculate the impulse​

Which atomic model was proposed as a result of j. j. thomson’s work?

What is the angular momentum of the bar about the axle?

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?