Recent content by tkahn6

Effects of Adding Water to Cobalt Chloride Equilibrium Homework Statement Co(H_{2}O)_{6} ^{2+} (aq) + 4Cl^{-} (aq) \Leftrightarrow CoCl_{4} ^{2-} (aq) + 6H_{2}O (l) Pink \Leftrightarrow Blue We're learning about Le Chatelier's Principal. My question is: Why does the...

Oh duh! Thanks! Yeah, that makes perfect sense. Thank you for all your help!

Thanks! I got it. But why is Fexty positive? Is is not pushing in the same direction as W?

Hey I have another question. A 225kg crate rests on a surface that is inclined above the horizontal at an angle of 20o. A horizontal force (magnitude 535 N and parallel to the ground, not the incline) is required to start the crate moving down the incline. What is the coefficient of static...

Thank you both for your help - especially alphysicist. I need to wrap my head around the fact physics is applied math. I totally did not connect the fact that F is inversely related to \theta and therefore prone to asymptotic behaviour as (cos(\theta) - \mu sin(\theta)) approaches 0...

Thank you for your help! OK. F = \frac{(mu)mg}{(cos(theta) - sin(theta)(mu))} When I solve the denominator for 0 I get 67.723o which is the answer that is in the book. Is this because at all theta values below 67.723 F is positive? But I thought F represents the magnitude of the...

Would F be any arbitrary magnitude or would it increase linearly with theta? Fcos(theta) is always going to equal mu(mg + F sin(theta)) because the box is in equilibrium right? Am I looking for where FKinetic > F cos (theta) ? I am really lost.

Homework Statement While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.410. The pushing force is directed downward at an angle theta below the horizontal. When theta is greater than...

Homework Statement An Olympic long jumper leaves the ground at an angle of 23o and travels through the air for a horizontal distance of 8.7m before landing. What is the takeoff speed of the jumper? Homework Equations 8.7m = cos(23o)Vot y = sin(23o)t + (1/2)(-9.8m/s2)t2 0m2/s2 =...

The way I read this, the cannon is sitting at the bottom of a valley shooting a cannon ball towards a cliff that is 60m away and 25m high. Therefore, shouldn't you be looking to see where the canon is vertically at t where xhorizontal = 60m? I get about 24.887m at t = 2.51655 for...

I suspect this is a very stupid question but: Why is voltage across a component (say, an LED) important? Isn't current the only important factor? If it says on the package 2.1V, 20mA. What does this mean? Does it not matter if I connect it to a voltage of 5V over 250Ω or 3V over 150Ω...

Thanks! I'm a Junior in high school. As for my experience, I've stuck with teaching myself computer science for the past few years. Thus, I've built no models nor messed with any kits. However, I am quite familiar with C and have a working knowledge of pointer arithmetic/manipulation (if that...

How do I even get started with analog/digital circuit design? Can you recommend any books or lectures I can read or watch? How did you get started? Thanks!