Which point(s) on the graph indicate a change in acceleration?
a) b only
b) b and d
c) a, c, and e
d) a and e

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

In a system, when potential energy decreases, then entropy also decreases. true false

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?