Recent content by crimsonn

I think I'm super sleep deprived because that was pretty simple. Thanks you two :)

Homework Statement Calculate the current through the resistor of resistance for circuit B. Express your answer in terms of EMF, R1, and R2. http://imageshack.us/photo/my-images/163/screenshot20111112at110.png/" Homework Equations Kirchhoff's Loop and junction rules The Attempt at a...

1. Done in a lab: % difference: 0.679%, inherent error: 0.7%, % RAD: 0.941%. Anyway, I'm just having trouble interpreting what they mean in comparison to each other. What does the inherent error say about the % difference? And what does it mean if my %RAD is greater than my inherent error...

Alright, thank you -- the part about whether to draw them through the top two points was the most confusing. I printed it out and drew the trend lines, and I agree that's its more like 19.97mL.

Homework Statement This was done in a lab, we titrated 0.2M NaOH with an unknown concentration of acetic acid. I've used excel to graph my first derivative of the data. Homework Equations (change in pH)/(Change in volume) The Attempt at a Solution My professor talked about drawing two trend...

1. A 28.0 kg block is connected to an empty 1.35 kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.450 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the...

I'd really appreciate help on another kinematics problem. This one is harder than the first. 1. A stone is thrown vertically upward with a speed of 12.0 m/s from the edge of a cliff 70.0 m high (Fig. 2–34). (a) How much later does it reach the bottom of the cliff? (b) What is its speed just...

wow. just kidding. sorry. stupid, stupid mistake. instead of 4ac in the quadratic I used 2ac. I was just so convinced that I was right -.- thank you everyone.

that doesn't make much sense to me. Honestly, I'm just reviewing from my chapter 2 test for physics. It shouldn't take anything more than kinematics.

assuming negligible air resistance, how long will it take for a sphere to fall 36.0 meters if thrown downward at 12 m/s? 2. kinematics x= x0 +v0t + (1/2)at^2 3. plugging it in.. 36= 12t + 4.9t^2 4.9t^2+12t - 36 doing all the math and what not with the quadratic I get...

wow. thank you. that was actually a very simple problem. I made it more complicated than it was.

A ball of mass 0.440 kg moving east with a speed of 3.70 m/s collides head-on with a 0.220-kg mass at rest. If the collision is perfectly elastic, what is the speed and direction of each ball after the collision? momentum conservation: m1v1 + m2v2 = m1v1¢ + m2v2¢; (0.440...

{i was actually a lot more off in my answer from doing it backwards (i forgot the sqrt) } Wow. Thanks, that actually made a lot of sense. I get the correct answer! thank you again. I really appreciate it!

okay! I think I've got I just figured out the angle: arctan = 5.40 X 10^ -23 / 9.0 X 10 ^ -23 = 30.1 degrees! (does happy dance) but then, sqrt((9.8 X 10^ -23 X cos 30.1)^2 + (5.4 X 10^-23 X sin 30.1)^2) = 3.6 X 10^-12 hmmm...

I have drawn a diagram. But...what really gets to me is that this is supposed to be a collision problem, yet I don't understand quite how it actually IS one. Could my equations work though? I'll still confused about the mass of the nucleus? I mean...i've tried them over and over again. If my...