A neutron with a mass of 1.67 × 10-27 kg traveling east with a kinetic energy of 2.00 × 10-21 J collides perfectly elastically with a helium nucleus with a mass 6.68 × 10-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80 × 10-21 J. What angle was the neutron deflected during the collision? I am able to calculate the values of the final velocities. I just don't know what to do with the information provided and the information I calculated to get the final angle of deflection.

You need to use conservation of momentum in order to find the angle at which the neutron was deflected. Although, I would need to see an image of the problem or know if the helium nucleus was being deflected at an angle as well.

You can split up momentum into x and y components, similar to force. I.e

Pxi=PxF

PyY=PyF

Py:mvsin(theta)=mvsintheta

Px: mvcos(theta)=mvcos(theta)

Hopefully these equations can help you solve the problem.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015