Recent content by phEight

Homework Statement CH3CH2-Br + (CH3)3C-O¯+K ----> (CH3)3C-O-CH2CH3 ethylbromide + potassium t-butoxide ---> ethyl t-butyl either can someone please tell me why this is a Sn2 reaction? Homework Equations The Attempt at a Solution I figured it should be Sn1 because the...

Ah that makes sense, so if they were moving away from each other it would f' = f(v-vo)/(v+vo) ?

Frequency Problem, need urgent help please Homework Statement A train moving west at a speed of 30 m/s emits a whistle at a frequency of 348 Hz. On another train behind the first train and moving west at a speed of 20 m/s, the engineer hears the whistle from the first train. If the speed of...

URGENT: Sinusoid graph problem! Hello Here is the problem: Naturalists find that the poplulations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started being kept when time t = 0. A...

Problem has been figured out... alls I had to do was simply being togeather the shaded regions to create a smaller circle with the diameter of 6. Thanks for anyone who attempted to help!

Hrm, hadn't thought of it that way. But how should I go about finding the area of the circle? I don't have the radius or the circumference, all I have are the values for the equilateral cross. Also, those caps are not shaded, only the sectors. The only part I am iffy about it in the way I...

URGENT: Regarding finding the area of a certain region within a circle Hello I have included an image of the diagram with the question on it. I understand what I am trying to find here is the sector of the circle, however to calculate this you must have the radius of the circle... something...

Thanks for giving me a more "in depth" look at what is most probably basic mathematics to most of you. I'm still learning. :)

what am i missing here? this seems to make sense... a + b = c 4a - 3a + 4b - 3b = 4c - 3c 4a + 4b - 4c = 3a + 3b - 3c 4(a+b-c) = 3(a+b-c) 4 = 3