A 20 kg cart moving east with a speed of 6 m/s collides with a 30 kg cart moving West. If both carts come to rest immediately after the collision, what was the speed of the westbound cart before the collision?

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

Bis the answerhope it !

An adiabatic process is one which occurs without the transfer or matter or heat in a system.

Aself-report inventory  is a type of  psychological test  used in personality assessment. this type of test is often presented in a paper-and-pencil format or may even be administered on a computer. a typical self-report inventory presents a number of questions or statements that may or may not describe certain qualities or characteristics of the test subject.