find the volume common to two spheres, each with radius r, if the distance between their centers is r/2. [hint: it may be helpful to look at the previous question and see how it relates to this one. ]

How did different parts of the united states feel about slavery

All of these sentences include commonly confused homophones. which sentence is correct? you put too much sugar on your breakfast serial. my father grows vegetables and flours in his garden. will someone me untie the knot in my shoelace? when did the captain set sale on his trip to north america?

What did pavlov initially notice about the animals in his original research after conditioning took place?