A 60 kg astronaut hovering in an orbiting space station throws a 10 kg water bottle (that he is holding) across the room at a speed of 8.0 m/s. What is the magnitude and direction
of the astronaut's velocity after he throws it?

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

when it gains or loses electrons

this is poiselle's equation from fluid mechanic in physics. mech eng