Recent content by Asuncion

Since you put it that way. Δv=v. However, the problem states that the speed doubled plus its going in the opposite direction, that's where I got the -2.

Thanks SHISHKABOB! I have to take a break for an hr or two. Gotta get dinner ready for my husband and three kids, but I'll be back! ;)

You are so right e^(i Pi)+1=0! Thank you :smile:

3. I'm going to try. Going back to pre-calculus-solving exponential equations w/ same base. Let original velocity = u. v=\frac{-2u}{.45} a=\frac{-3u}{.45} Then \frac{-2}{-3} = .66666667 or 6.7s^{-1} or 6.7*10^{-1}...

1. speed_{avg} = 71 mph and velocity_{avg} = 44 mph. Therefore, 71 mph -44 mph = 27 mph.

I have to admit this one was tricky because normally (well the way I learned in chemistry) the given units come first then the desired conversion factor comes next. In this case the desired conversion factor came first (or as you say take the reciprocal) then the given. Well We knocked #2 out...

Oh SHISHKABOB Your the best! I found my mistake I shouldn't have been separating 6.7 * 10^{7}. thanks again SHISKABOB I was making it too complicated! I'm trying not to I always make the easy stuff complicated, but the complicated stuff comes easy... why me :rolleyes:

2. Sorry, if you haven't figured it out already I'm a Visual Learner. But Thank that you God, a Light bulb just went off in my head. \frac{1 cal}{10^{-9} sec} \frac{1 sec}{6.7 *10^{7}} When you add the exponents you get \frac{1}{6.7*^10{-2}sec }. YAY!

2. Here's how I set it up but I still come out with the wrong answer. \frac{1 cal}{10^{-9}} \frac{1 sec}{6.7*10^{7}}

Okay so maybe I need more practice. :/

2. 1 cal \frac{1 ns}{10^{9-}} \frac^{7}{10}{6.7 cal}

Aww HA! Thanks :!)

\frac{calulations}{seconds}

2. Here's how I wrote it down on paper: 1 cal , 1 ns / 10^-9 sec, 10 ^7 sec/ 6.7 cal = .15 cal / 10^-2. Everything cancels out expect for nanosecond. Then after subtracting the exponents I get 10^-2. Instead of dividing by .15 cal / 10 ^-2 I flipped the numerator and denominator. 10^-2/ .15...

Oops I was playing around with the format. Trying to get my fraction format like yours instead of using the *^/ symbols. gets confusing.