What is the balance nuclear equation for the alpha decay of plutonium 244

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Name two kinds of practical electric pumps.