An air hockey puck (m = 0.20 kg) is traveling 4.0 m/s when it hits a stationary puck that has the same mass. a. What is the initial momentum of the first puck?

b. What is the total momentum of the system before the collision?

c. What is the total momentum of the system after the collision?

d. If the first puck stops, what is the final momentum of the second puck?

e. What is the final velocity of the second puck?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.