Two 125 kg bumper cars are moving toward each other in opposite directions. car x is moving at 10 m/s and car z at –12 m/s when they collide head–on. if the resulting velocity of car z after the collision is 10 m/s, what is the velocity of car x after the collision?
–12 m/s
–10 m/s
10 m/s
12 m/s

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?

Identify some abiotic characteristics of the tundra biome.

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force