Water is placed in a freezer where it becomes a solid and decreases in entropy. According to the second law of thermodynamics, what allows for
this process to occur?
a. The entropy of the air outside the refrigerator increases more than the
decreasing entropy of the freezing water.
b. As water freezes it expands and takes up more space which actually
increases the entropy of a system.
C. As water freezes it decreases in temperature which actually increases the
entropy of a system.
d. The entropy of the air inside the refrigerator decreases because it is an
isolated system

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.

Will mark brainliest! asap! ! 16) which of the clouds shown would indicate a possible future rain storm? a) b) c) d)