A collision occurs in a closed system. How often are linear momentum, kinetic energy and total energy conserved? Linear Momentum
Kinetic Energy
Total Energy

A. Always, Always, Always

B. Always, Sometimes, Always

C. Always, Sometimes,
Sometimes

D. Sometimes, Sometimes,
Always

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.

its a circle not a square that's simple silly.

explanation: