1. A 65 kg astronaut is on a spacewalk when the tether line to the shuttle breaks. The astronaut is able to throw a 12 kg oxygen tank in a direction away from the shuttle with a speed of 10 m/s, propelling the astronaut back to the shuttle. If the astronaut starts from rest, find the final speed of the astronaut after he throws the tank.

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?

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.

Ne way in which elements differ from each other is the structure of the electron cloud in each element's atoms. in an electron cloud, an electron that is farther away from the nucleus has