Cart A has mass of 5 kg and cart B has mass of 2 kg. What is the momentum of the system of the two carts if:

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

Which best represents the law of conservation of mass ?

Which type of basaltic lava flow has a fairly smooth