Which of the following statements is correct about the energy of water stored in a tank?
1. Water stored in the tank has kinetic energy and potential
energy
2. Water stored in the tank has kinetic energy only.
3. Water stored in the tank has no energy.
4. Water stored in the tank has potential energy only.

Argon, neon, and xenon are examples of

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?