Recent content by coldjeanz

so then I would eventually end up with: sinθ1/sin(90-θ1) = n2/n1 still not sure how the left side turns into tanθb though...

From Snell’s Law equation (2) get the Brewster’s angle formula given by equation (4) when θincident+θrefracted=90°. equation 2: n1 sin θ1 = n2 sinθ2 equation 4: tanθB = n2/n1 This is kind of foreign to me as I haven't studied it yet, not sure how you go from Eq 2 to E4, how does tan come from...

Yeah okay that went through my head for a split second but I couldn't find that in my book so I didn't know where they pulled it from. Thank you!

I understand everything up until: √MgL/m = L/t Why is that equal to L/t? I also don't understand this either: This is the problem itself however I don't feel it's that important since I am trying to figure out how they are arriving at their conclusions. An astronaut on a small...

Ah ok I was forgetting to multiply my Amplitude by ω Got it thanks

Homework Statement In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the following expression, where x is in centimeters and t is in seconds. x = (7.00 cm) cos(4t + π/6) At t = 0, what is its velocity? Homework Equations v(t)...

I have read my text and watched youtube videos but this just won't register in my brain. Does anyone have a much simpler way to explain it or know of another source that can help. Specifically, how would one use it to figure out the direction a current is going given a variety of different...

nevermind, figured it out.

Homework Statement A piece of aluminum foil of mass 4.3 10-2 kg is suspended by a string in an electric field directed vertically upward. If the charge on the foil is 2.7 µC, find the strength of the field that will reduce the tension in the string to zero. Homework Equations E=...

Ok so you set one up using all the initial values and then another using all the final values? I tried doing this for the initial temp but it's still saying I'm getting the wrong answer... pV=nRT (5.6 atm)*(13.5 L) = (4.15 mol)*(8.314 J/mol*K)(T) I get something like 2.2 and since it...

But how does that differentiate between the initial and final temp? P (final-initial) * V (final-initial) = n*R*T(final-initial) I still have two unknowns then.

Homework Statement A 4.15 mol sample of a diatomic ideal gas (γ = 1.4) expands slowly and adiabatically from a pressure of 5.60 atm and a volume of 13.5 L to a final volume of 34.5 L. Find initial+final temperatures Homework Equations pV/T (all initial) = pV/T (all final) The...

Acceleration is in the x-direction and forces add to 0 in y?

Homework Statement Homework Equations Vτ = r(ω) ω=dθ/dt The Attempt at a Solution I have gone through this section in my book and see nothing about doing this with masses involved. There's no time involved in this question so how do you get ω? I'm really lost here, any...

^Thanks But once I calculate my Force due to friction how do I get the "s" that I need to multiply with the Force in order to get the Work. If I just multiply it with the ramp height it doesn't give me the right answer.