Atrain car with mass m1 = 663 kg is moving to the right with a speed of v1 = 8.8 m/s and collides with a second train car. the two cars latch together during the collision and then move off to the right at vf = 5.3 m/s. 1)what is the initial momentum of the first train car?

5.83*10^3 m*Kg/s^2 to the right

Explanation: In order to solve this problem we have to consider the definition of momentum which is given by:

P=m*v= in this case for the train car #1  it has v1initial= 8.8 m/s and mass equal to 663 Kg, then we can culculate the initial momento for train car number 1:

P1initial=663 Kg*8.8 m/s=5.83 *10^3  m*Kg/s^2 directed to the right

a.

explanation:

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.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

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