A 1210 kg car is driving NE (at 45.0.) at 15.2 m/s when it is struck by a moving 1540 kg car. Afterward, they stick together and move directly east (at 0) at 23.3 m/s. What was the *y*-component of the second car's initial velocity?

What produces a record of seismic waves? richter scale seismogram barometer seismograph

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

Name three populations commonly found in a prairie system