Recent content by Grapz

Homework Statement What is the effect of an insoluble impurity such as sodium sulfate, on the observed melting point of a impure compound? Homework Equations The Attempt at a Solution My answer is, there is no effect on the melting point of this particular compound. Because it...

Homework Statement The equation dQ/dt = k ( T - Troom) is Newtons law of cooling. dQ/dT being the rate of heat loss. I want to convert this equation to dT/dt, the rate of temperature decay. How do i go about doing this? Homework Equations The Attempt at a Solution Is Q...

The answer is that the charged insulator will also move. Proved experimentally. The prof also gave a explanation: The charged insulator rod will move towards the wire because it will polarize the wire, resulting in an attractive force between the wire and the charged rod. The bar magnet...

Hmm okay. Well that is a much deeper explanation. But this was the original question. And we assume it is DC circuit You have a current going into the page. You have a magnet close to the wire, and a insulator with + and - Q at either ends, and you have neutral copper metal near the wire...

Consider a wire, with current flowing through it. A small light insulator is brought close to the wire. The insulator has positive charge on its right end and a negative charge on its left end. But there is no net charge, it is neutral. What happens? Does the electrons in the current attract...

Homework Statement Are these two structures resonance? if not why not? Homework Equations The Attempt at a Solution I drew these resonance forms myself, but the answer book didnt' have this resonance structure in its answer and i wanted to know if this indeed is a...

Nope, my textbook does a much better job than wikipedia, thanks tho

Homework Statement A sound source is located somewhere along the x-axis. Experiments show that the same wave front simultaneously reaches listeners at x = -7.0 m and x = 3 m a) What is the x-coordinate of the source? b) A third listener is positioned along the positive y-axis. What is her...

Thanks for the help. This is my method, but i am off by .6 from the answer. i used the kinematics equation to solve for the speed. Vf ^ 2 = vi ^2 + 2 a s i get vf = 0.766 m/s This vf is my new Vi for the spring. THen i use 1/2 k A^2 = 1/2mvi^2 I solve for k and i get...

well i don't have the mass for the energy equation, and i am not sure exactly what xo is, is it zero? and what is v_o .

Homework Statement A spring is standing upright on a table with its bottom end fastened to the table. A block is dropped from a height 3 cm above the top of the spring. The block sticks to the top end of the spring and then oscillates with an amplitude of 10 cm. What is the oscillation...

Homework Statement Hello, I'm doing an error analysis problem and I'm not sure how to compute this. What is 1.23 +/- 0.03 + pi Homework Equations I know the equation for the error of two additions. Error = sqrt of ( error in x ^2 + error in y ^ 2 ) The Attempt at a Solution...

Homework Statement What is the acceleration of the 2.0 kg block across the frictionless table http://s167.photobucket.com/albums/u143/grapz720/?action=view&current=phy.jpg Homework Equations I know the acceleration is positive for one block and negative for the other. F= ma , also...

I have another question :x. The acceleration of the whole system is 3.5333, that i agree. The calculation for T = 3x 3.5333 is the part i am not too sure about. Indeed the net force is 10.6 N. But i do not think tension is the only force acting on the trout. There has to be gravity acting...

ahhhh thank you i get it noww