Why is the reflection of a wave at a free boundary different from reflection at a fixed boundary?

A 45,000 kg train moves at a velocity of 12 m/s north. It collides with a 50,000 kg train moving 10 m/s south. If the collision is inelastic, what is the final motion of the trains?

instinct for canada goose

Which feature do highland climates have that lower elevation area do not? A tundra where there are no trees A tree line beyond which trees do not grow Permafrost, or a part of the ground that is permanently frozen An ice cap, or a permanent cover of

What is the current in a circuit that has voltage of 121.3 V and a total resistance of 56.3 Ohms? Include units.

Three capacitors C1 = 10.1 µF, C2 = 23.0 µF, and C3 = 29.4 µF are connected in series. To avoid breakdown of the capacitors, the maximum potential difference to which any of them can be individually charged is 125 V.

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?

Is it possible to put a distance versus time graph to be universal go mine