# Search results

2. ### Single Slit problems

Homework Statement At what angle will 750nm light produce a second minimum if the single-slit width is 2.0um Homework Equations Sin(theta)=n(lambda)/w The Attempt at a Solution This is what I got so far (theta)=sin-1(3x10^-6/2x10^-6) I dont understand why I keep getting error on my...
3. ### Ripple Tank questions

Homework Statement Two sources 6.0 cm apart, operating in phase, produce water waves. A student selects a point on the first nodal line and measures from it 30.0cm to a point midway between the sources and 5.0cm (on the perpendicular) to the right bisector. a) what is the wavelength Homework...
4. ### Springs & Energy

Homework Statement Hello, I'm having an issue with a question I have all the numbers and everything but I cant quite get the answer correctly and its very frustrating.. A mass, m is held at UEP of a vertical spring constant k & allowed to fall. Calculate: a) The maximum stretch(max bottom) b)...
5. ### Impulse question

Homework Statement Calculate the impulse(change in momentum) in each of the following situations. Also, state the direction of the change in momentum. A 4kg ball strikes a stationary pin head-on at a speed of 3m/s. It continues to move in its original direction, but its speed is reduced to...
6. ### Conservation of momentum and mass of a ball

Homework Statement A 0.160 kg ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. a) what is the mass of the ball b) what fraction of the original kinetic energy gets transferred to the second...
7. ### Conservation of Momentum law problem

means like dude lol kids these days
8. ### Conservation of Momentum law problem

alright thaanks dawg really appreciate that, last question in the example he gave so the last line was 50-50 = -30v2'+7.5v2'^2 the left side what if it wasnt 0
9. ### Conservation of Momentum law problem

but why is that though? :( pls
10. ### Conservation of Momentum law problem

WOW WHAT THE ****, OK I DID THAT ONE BEFORE. Its this right? " V1+V1' = V2+V2'" but can u explain why that is that cus it made some sense to me. & I showed my friend this process but, she said it made no sense so.
11. ### Conservation of Momentum law problem

Im just stuck because the example that my teacher gave was like "50=2(10-3v2'/2)^2+3v2'^2" that bracket part confuses me
12. ### Conservation of Momentum law problem

Homework Statement m1= 3kg m2= 6kg v1 = 5m/s v2= 2m/s d = 3m DIAGRAM : http://gyazo.com/17b3126726b109256a35f65b86708bb0 Homework Equations Conservation of momentum: m1+v1 = m1v1'+m2v2' Conservation of elastic: m1v1^2+m2v2^2 = m1v1'^2+m2v2'^2 The Attempt at a Solution Now my attempt...
13. ### Circular Motion -- maximum speed Tarzan can tolerate at the lowest point of his swing?

Homework Statement Tarzan plans to cross a gorge by swinging in an arc from a hanging vine. If his arms are capable of exerting a force of 1500N on the rope, what is the maximum speed he can tolerate at the lowest point of his swing? His mass is 85kg; the vine is 4.0m long Homework Equations...
14. ### Calculating the initial charge on an object

Homework Statement Neutral metal sphere A, of mass 0.10kg hangs from an insulating wire 2.0m long. An identical metal sphere B, with charge -q, is brought into contact with sphere A. The spheres repel and settle(a picture just imagine a right angle triangle with 2 objects A and B at the...
15. ### Calculating Initial Charge

alright I got it now, is it okay to leave it as a decimal instead of keeping it into an exponent? or will that mess up everything
16. ### Calculating Initial Charge

yeah, damn. Well I looked through my notes & I did it all wrong, I have to I guess make it into a complex trinomial & complete the square?(This is in terms newtons law, so I dont know how to transition that into coulombs law
17. ### Calculating Initial Charge

Homework Statement Two small spheres with charges 1.6*10^-5 C & 6.4*10^-5 C, are 2.0m apart. The charges have the same sign. Where, relative to these two spheres, should a third sphere, of opposite charge 3.0*10^-6 C, be placed if the third sphere is to experience no net electrical force? Do we...
18. ### Calculate the tension in a tube

That was the whole question. He just gave us the diagram, & the numbers and told us to calculate the tension.
19. ### Calculate the tension in a tube

Homework Statement given mass: 100g(the one hanging) Q1 = -30(mu)C Q2 = 70(mu)C Q3 = 50 (mu)C T=? Length of tube = 2m Length of rope = 1m Homework Equations Ft + Fg + Felect =0 F =k *q1*q3/d2 The Attempt at a Solution Those were the equations I have done so far, so the answer is 46N & the...
20. ### The equation to calculate the tension in terms of Coulombs Law

Its a tube with 3 sphere's on it. sphere 2&3 are connected in together in a rope & sphere one(bottom) has a negative charge & I'm supposed to solve for the tension of the rope.
21. ### The equation to calculate the tension in terms of Coulombs Law

( I apologize for the drawing
22. ### The equation to calculate the tension in terms of Coulombs Law

Hello I was wondering what the equation is to calculate the tension in terms of coulombs law an example problem would be http://gyazo.com/1319551eb367990c75ee0a782e38a2c2