Recent content by Dalkiel

Homework Statement I'm trying to work out the derivation of the the Rutherford scattering trajectory. I understand the conservation of linear momentum, and that the only force acting is the coulomb force between the incoming particle and the target nucleus. Early on in the derivation I'm...

Thanks!

Homework Statement Say I have a circuit with only 2 components, a battery and a capacitor. Is this circuit considered series or parallel? What about a charged capacitor and an uncharged one? Does the fact I have an oscilloscope connected to the capacitor to read the voltage across it affect...

Sure, but it's actually a combination of two questions. One is direct from a textbook, and then and then there's my professor's part. Original from text (problem #70): A boat, whose speed in still water is 2.70 m/s, must cross a 280-m-wide river and arrive at a point 120 m upstream from...

Sorry about the wording, I basically just paraphrased the problem to the basic components. Here's the solution that was explained to me, using another horribly drawn ms paint picture as a guide. The yellow line is straight across the river, green line is where we want to go, brown is where...

The answer that was found (39.5°) is correct, but there was actually another way to solve this, using the law of sines. I'll try to draw another picture to describe it when I get home.

280 is the width of the river. if there was no current, and the boat wanted to go straight across the river, it would have to travel exactly 280 m. In my (horribly drawn) picture, 280 is the vertical distance, or the y component of the displacement.

Thanks. I used the quadratic equation way and got the same answer as my previous attempt.

Homework Statement 280m wide river, destination 120m upstream, river current is 1.35 m/s downstream and the boat speed in still water is 2.70 m/s. What should the boat's heading angle be (relative to the shore)? Homework Equations V_x = Vcosθ V_y = Vsinθ x = V_0 t (starting points set to 0...