Recent content by clockworks204

I do appreciate the info

Thank you for your reply. Can you please specify what exactly a lorentz parameter is?

nuclear diameters will a meson traverse? Approximately how many nuclear diameters (A=100) will a (pi)0 meson traverse at a speed of 0.95c before it decays? My textbook is very vague for the chapter containing this material. The only thing that is really given is that the mass is 135.0...

Thanks, I understand now.

Thanks for your reply. Although I understand what you are saying about the 3 beams on each side with one central, how do you derive that explanation from 0.3164?

1. Light of wavelength 632.8nm is normally incident upon a grating of 5000 lines/cm. How many different diffraction orders can be seen in transmission? 2. m(lambda)=d(sintheta) 3. According to my text, d=1/5000lines/cm = 2x10^-6m and sintheta= lambda/d = 632.8x10^-9/ 2x10^6 =...

1. A current in an RL circuit rises to one half of its maximum value in 7.0s. a) what is the inductive time constant for the circuit? b) if L= 0.8 H, what is the value of the resistance? 2. My book says the (time constant) = L/R 3. I've tried plugging into the above equation, but I...

I was able to figure it out finally by using I=.5mr^2 instead of mr^2 and dividing the final answer by the coef of friction to get the correct force. Thanks to all!

I do recognize the equation .5mr^2, but I was unsure of it. So if I add in the coefficient of friction I get: I=.5(2.8)(1.1^2) = .014; Torque= I(a)(.75 fric coef)= .014(10.47)(.75)= .1099; F=T/r =.1099/.1 =1.099 I don't know how else to do it... Everybody in the class is stumped on this...

Yes, I meant to put 2.93 instead of 2.22, but either way both are incorrect. I don't understand what is wrong with the inertia formula.. I've looked again, and it seems like mr^2 is correct.. and mr^2(a) is Torque also correct so I'm still stuck.

1. A piece of metal is pressed against the rim of a 2.8- kg, 20- cm-diameter grinding wheel that is turning at 2000 rpm. The metal has a coefficient of friction of 0.75 with respect to the wheel. When the motor is cut off, with how much force must you press to stop the wheel in 20.0 s? 2...

Thank you all for your input! I was able to get the answer by splitting into the 2 equations like everybody said to do. 49.9 km/hr and 342.8 deg were the answers I came up with. Thanks again!

1. A 1000- kg car collides with a 1200- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 25.0 km/h in a direction of 20 o with respect to the positive x axis. The heavier car moves at 28 km/h at -44 o with respect to the...

Yep you caught my error. I simply missed taking the square root of the solution because there was quite a bit going on. I'll try using Latex next time...I was unaware of it. Thank for you help collinsmark.

1. A newly found planet with a density of 4950 kg/m3 has no atmosphere and is orbited by a low altitude satellite with an orbital speed of 3.55 km/s. What is the mass of the planet? 2. density*velocity=mass G= 6.67E-11 3. After a process of equations, I ended up with mass=...