Two iron asteroids collide elastically in one dimension. The first has mass mi = 4M and
velocity v1i = +5.00 m/s. The second has
mass m2 = M and velocity v2i = -25.00 m/s.

What is the final velocity V1f of the first
asteroid and V2F of the second asteroid?
[?] m/s

Remember: right is +, left is -

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

Name two kinds of practical electric pumps.

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton