Two arrows are fired horizontally with the same speed of
30.0m/s. each arrow has a mass of 0.100 kg. one is fireddue east
and the other due south. find the magnitude anddirection of the
total momentum of this two-arrow system. specify the direction with
respect to due east.

Explanation:

Given

mass of each arrow=0.1 kg

velocity of arrow=30 m/s

One arrow is fired u=due to east and another towards south

Momentum of first arrow

Total momentum P

magnitude

direction

clockwise w.r.t to east

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

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cathode rays were bent in the same way whenever a magnet was brought near them.