Recent content by baylorbelle

it figures it would be a simple mistake like that. I was using the speed of light instead of the speed of sound. Thanks for clearing up my careless error.

A microphone is located on the line connecting two speakers that are 0.650m apart and oscillating in phase. The microphone is 2.25m from the midpoint of the two speakers. What are the lowest two frequencies that produce an interference maximum at the microphone's location? okay, so i have...

thanks!

1/2 mv^2

A proton with a kinetic energy of 4.6×10−16 J moves perpendicular to a magnetic field of 0.26 T. What is the radius of its circular path? I know the formula is r=mv/qb. the only thing not given is v. So my question is how do I get v from Joules? I know 1 Joule=1N/m, and that N=ma, but I...

Thanks for all of your help! yes, the original problem did say 8 Earth Radii(sp), and the answer was 7.9 km/sec. the answer key in the back of the book had a typo on it, so it kept throwing me off.in the end, i figured out. thanks again for the tutoring.

i finally figured out where the formula was wrong. on the right side, the G is negative. that seemed to help a lot!

The book says that the answer is 7.91 m/s. And I don't know, but it doesn't seem like its right to me on the right side, but I don't know what I would change it to. Thats the formula that the teacher gave to us in class, but its definitely not working.

What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to 8REarth before coming to rest momentarily? I think the formula for this problem is 1/2 mv2-G(mME/RE)=G(mME/2RE); I cancel out the m because it is in every variable; but whenever I plug...

thanks, that really helped a lot : ) i finally figured it out

if something is rolling without slipping, it has rotational speed but not translational speed?

and i use 39 rather than 61 for the theta, because the torque is measured in the arm?

What linear speed must a 6.0×10−2 hula hoop have if its total kinetic energy is to be 0.15 J ? Assume the hoop rolls on the ground without slipping. So, i know that the formula for linear momentum is p=mv. however, the hoop is circular, meaning it has to have a rotational velocity (omega)...

You are designing exercise equiptment to operate as shown in the figure: where a person pulls upward on an elastic stretched length of .31m. If you would like the torque about the elbow joint to be 81 N*m in the position shown, what force constant, k, is required for the cord? ::: okay, so...