Recent content by Abid Rizvi

Hi, I read that scattering is just hitting a particle and bouncing off at some other direction. But I also read that scattering involves the complete absorption and emission of a particle/wave. Is this part correct? I have been unable to find that bit of information anywhere else.

Sorry this is way late. In the end I figured out the issue. You were right to suspect looking at gauge pressure. I simply needed to add that extra atm... After that everything works! Thanks

The model answer used 5/2 R for Cv. The model for how to get the right answer is on this link: <http://www.cpp.edu/~skboddeker/132/assign/ch21h.htm>. Sorry, but which details are you looking for? All of my work or was it all of the work done in the link above? PS, in the link, the answer is in...

Homework Statement During the power stroke in a four-stroke automobile engine, the piston is forced down as the mixture of combustion products and air undergoes an adiabatic expansion. Assume (1) the engine is running at 3400 cycles/min; (2) the gauge pressure immediately before the expansion...

So this tells me that the distance remains constant So it doesn't fall downward, and I don't fall down while driving. (But...I fall down if i push my seat down :D) So we get m1g-T = 0. Okay, I think I understand now how this works. Also I asked if block m2 is accelerating to the left relative...

Oh I defined the forces for the wrong blocks, I accidentally switched them. It should be T = m2a and m1g-T = m1a. However, I'm not sure I understand why it only accelerates horizontally. If block m2 starts accelerating to the right, then wouldn't block m1 start accelerating vertically since it...

Homework Statement What horizontal force must be applied to a large block of mass M shown in the figure below so that the tan blocks remain stationary relative to M? Assume all surfaces and the pulley are frictionless. Notice that the force exerted by the string accelerates m2. (Use the...

Homework Statement A horizontal plank of mass m and length L is pivoted at one end. The plank's other end is supported by a spring of force constant k (see the figure below). The plank is displaced by a small angle θ from its horizontal equilibrium position and released. Find the angular...

Ok guys after some experimentation I found what was wrong. When I found the force, I found my units had grams, and the answer wanted Newtons which has kilograms... :rolleyes: So I set up the force equation and then divided the result by 1000 and the answer worked. Thank you guys!

Homework Statement The "spirit-in-glass thermometer", invented in Florence, Italy, around 1654, consists of a tube of liquid (the spirit) containing a number of submerged glass spheres with slightly different masses (see the figure below). At sufficiently low temperatures all the spheres float...

Homework Statement The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.60 104 kg/s with an exhaust speed of 3.05 103 m/s. Find the acceleration the vehicle had just as it lifted off the launch pad on the Earth, taking the vehicle's initial mass as 3.00 106 kg...

YES! I got it. Okay so from what I understood, if a 5 m chord stretches 1.65 m, a 10 m chord should stretch 3.3 m (=1.65*2). So to do the conversion I need to find the factor to multiply by and that factor is given by f = (r/5) where 5 is the length of the small cord. So mg/fy = K. Putting that...

Ok so I put K = mg/L instead of mg/y for the chord, and I get L=2x which is obviously incorrect. I'm lost on what to do now...

Lol no I suppose not. Ok so K =mg/(stretched length) for a cord. I will try it with this.

Hi and thank you for responding I did set L as the change of length and r as the unstretched length. Also I just assumed K = mg/y. Does K change because of length?