A 20,000 kg railroad car is traveling at 5 m/s when it collides and couples with a second, identical car at rest. What is the resulting speed of the combined cars?

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

Does anyone have the answers to online physics course plato course physics, semester a v3.0

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?