Recent content by glasshut137

yeah the problem is stated that way which is why i think i keep getting the wrong answer.

Homework Statement THe intensity of a sound wave at a fixed distance from a speaker vibrating at 1.24 kHz is .388 W/m^2. Calculate the intensity if the frequency is reduced to 2.64 kHz and the displacement is doubled. used I=.5p(w^2)(A^2)v for the initial and the new intensity. I ended up...

[SOLVED] standing waves Homework Statement A standing wave is a superposition of two harmonic waves described by y1= Asin(kx+wt) and y2= A sin(kx-wt), where A=3.31594 cm, k=10.0531 m-1, and w=18.2212 s-1. Determine the smallest positive value...

Homework Statement The average sound level of a typical musical instrument in a musical group is B dB. WHat is the sound level in Db if 10 instruments are simultaneously playing. answer choices: B'= 10B, 5B, B+5, B+20, B+2, B+10, B+1, 20B, B, or 2B My first thought was that it would...

ok I got the first part but I'm still not sure about the second one. So since the center of mass of the rod alone is L/2 and L for the point mass then the center of mass of the system would be at (3/4)L ?

Homework Statement Consider a rod length L and mass m which is pivoted at one end. An object with mass m attached to the free end of the rod. g=9.8 m/s^2. Note: Contrary to the diagram shown, consider the mass at the end of the rod to be a point particle. Basically it looks like a rod...

Homework Statement A 3 kg block collides with a massless spring of spring constant 99 N/m attached to a wall. The speed of the block was observed to be 1.5 m/s at the moment of collision. (3 of 3) Given: the coefficient of static friction between the floor and the block is .703416. Does...

Homework Statement A mover's dolly is used to deliver a refrigerator up a ramp into a house. The refrigerator has a mass of 110 kg. The ramp is 2.1 m long and rises 0.42 m. THe mover pulls the dolly with constant velocity and with a steady force of 445 N up the ramp. The dolly and ramp...

ok i found the new linear speed using the new radius. Thanks a lot for all your help on this very long problem.

well i tried .33m/s as my asnwer and it was incorrect. I'm not sure what other linear speed the question could be referring to.

ok i see what you mean. so to find the distance i just used pythagorean to find the radius. For the next part i just used the the arctan(distance of y/distance of x). Would the linear speed of the flea be same as the rotational velocity given since that's the velocity at which it jumped?

yeah i understand that now. so for part three wouldn't the distance of point B from the origin just be the radius since the flea would land in the same spot relative to the the origin?

ok actually i used s=r(theta) (using s as the displacement in A) and got theta=41degrees and it was right. Thanks a lot. Still trying to work through the last 3 parts.

ok so i converted 34rev/min into m/s and got .33m/s which should be it's rotational velocity. So in order for me to find the displacement around this turntable i need to know how long the flea was in the air and use that to find the distance the table turned. I found the time by plugging it into...

ok so i tried finding the linear displacement relative to the origin by using the pythagorean theorem. d=sqrt(.049^2+.093^2)=.105m is this correct for the first part of the question?