A railroad car with a mass of 30,000 kg is moving at 2.0 m/s when it runs into an at-rest freight car with an equal mass. the cara lock together. what is their final velocity?

A. 2.0 m/s

B. 0.5 m/s

C. 60,000 kg-m/s

D. 1.0 m/s

What fact does antoine lavoisiers work show

5. An object has a momentum of 4,000 kg-m/s and a mass of 115 kg. It crashes into another object that has a mass of 100 kg, and the two objects stick together.

The emf produced in a generator is Vemf = 25 sin 377t. What is the frequency of rotation of the circular coil? 50 Hz 60 Hz 25 Hz 15 HZ

Lasers can be used in in place of a knife.

If the fundamental frequency of a violin string is 440 HzHz, what is the frequency of the second harmonic?

What is the definition for chemical change

What is the asthenosphere made out of? a. Solid Rock b. Liquid Rock c. Liquid Iron d. Solid Iron

An atom of nitrogen has five valence electrons. How could a nitrogen atom become more chemically stable

Mirages are due to: interference refraction reflection scattering

As you throw a ball, you exert a force on that ball of 4.2 N. You exert this force on the ball while the ball moves a distance of 0.50 m. The ball then leaves your hand and travels a horizontal distance of 8.5 m to your friend.