Recent content by qtp

thank you for your input :) Preston

Hi, This is not directly related to any assignment but I have a question. Is it better (meaning the drinks in the cooler will stay cold longer) to leave the cold water in a cooler or to drain the cold water out of the cooler. Personally, I am inclined to think that you maintain a higher...

thank you for approving it. this is not a homework problem. it is just a curiosity thing thank you

Hi, I have a question regarding the forces involved in an inclined elevator boat lift. Attached is a diagram of the setup. I was wondering what forces are involved. I know that there is a torque that is exerted on the inclined arm equal to the weight of the boat times the distance of the...

the gravitational field inside of the Earth depends only on the mass contained inside of the radius. b/c of the geometry of a sphere the mass outside of a given radius has all of its gravitational effects cancel. also any mass dropped down the cylinder will oscillate back and forth with simple...

why would the probability not be zero at x=L ?? it should be zero AT the boundary but little to the left say L-\Delta x it will be almost zero but very small

how can the velocity = x+3 if the acceleration is x+3 ?

how is it that you can say r_a = cos (theta/2) when r_a is a radius with a real length and cos(theta) is a dimensionless quantity?

Hi, I am going to be taking the physics GRE in April and i was wondering if there is a good website I can go to or a forum for discussion of such things. Thank You Preston

funny thing is you are already using latex lol just put the [ tex] [ /tex] on either end and change ( ) for { } and it's pretty much the same thing

this is a center of mass problem. the system will conserve the center of mass and when the girl starts to walk towards the shore the canoe will move away from the shore to conserve the center of mass.

why can't u just add the acceleration into the calculation of the EOM for the pendulum and see what you get? i would think that it would change the measured period in the same way that things on the Earth experience a coriolis effect.

if you look at the new component it ends up adding a term which is dependant on the angular velocity. i found that the net force is F_{net} = -m g \sin{\theta} -k l \frac{d\theta}{dt} then u use small angle and angular acceleration to get it down to \frac{d^2 \theta}{dt^2} + \frac{k}{m}...

how is amplitude not independant of the other three? when velocity = freq x wavelength

yes there is also an electric field. that's why power lines humm because of the huge potential they have relative to the air and the effect it has on the moisture