How many isotopes does argon have? explain how you determined this

An aircraft as loaded weighs 4,954 pounds at a CG of 30.5 inches. The CG range is 32.0 inches to 42.1 inches. Find the minimum weight of the ballast necessary to bring the CG within the CG range. The ballast arm is 162 inches.

A car was moving at 30m/s when it hit a pole. It took 2 seconds to come to a stop. What was the car's acceleration in the crash

What layer of the atmosphere is made mostly of hydrogen and helium?

A bundle of nerve fibers is called what

What can be the best type of safety net in hard times?

A uniform rope of length L and negligible stiffness hangs from a solid fixture in the ceiling. The free lower end of the rope is struck sharply at time t=0.

A 62 pound box is on an incline. Determine the minimum force P that would result in the box starting to slide up the incline. (include units with answer)

During a collision with another car, the occupants of a minivan initially travelling at 4.0 m/s come to a complete stop in 0.5 s. What was the acceleration of the occupants of the minivan? a) 8.0 m/s2 b) - 8.0 m/s2 c) 2.0 m/s2 d) - 2.0 m/s2

A system dissipates 12 J of heat into the surroundings; meanwhile, 28 J of work is done on the system.

Charlotte, a 60.0-kg skin diver, shoots a 2.0-kg spear with a speed of 15 m/s at a fish who darts quickly away without getting hit.