Ohio Achievement Test Coach Science, Grade 5 10. Bob first blows whistle hard. Then he blows the same whistle gently. What
changed when Bob blew the whistle the second time?
POSTTEST
A pitch
B. volume
C. pitch and volume
D. frequency

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.