A larger, faster-moving 20 kg mass strikes a slower, smaller moving mass, having a momentum of 99 kg m/s, from behind and then slows to 4 m/s and while the smaller mass now has a momentum of 47 kg m/s. What was the original velocity of the larger mass? PLEASE HELP!

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y

helium

oxygen

neon

sodium