Sound waves that move from one medium to another at an angle change
direction due to
A. refraction
B. resonance
C. diffraction
D. reflection

the answer for sodium is 0.186

the answer for rubidium is 0.251

a corroding iron, if that's one of your choices

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.