A 63. 0 kg astronaut is on a spacewalk when the tether line to the shuttle breaks. The astronaut is able to throw a 10. 0 kg oxygen tank in a direction away from the shuttle with a speed of 12. 0 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut starts from rest, find the final speed of the astronaut after throwing the tank.

Apopulation of deer mice was introduced into a desert ecosystem. being dark-colored, the deer mice stood out in the sand and were easy prey for predators. over a few years, the color of the mice changed from dark brown to light brown. what role does natural selection play in this example? a. the change of color camouflaged them, which them hunt better. b. the change of color enabled them to regulate their body temperature. c. the change of color allowed them to hide better from predators. d. the change of color made their bodies tolerant to the harsh desert sand. e. the change of color allowed them to deflect the excessive heat.

Which phases do not always fill their containers? select all that apply a. solid b. liquid c. gas

The different layers of gases that extend form the surface of the earth into space