Recent content by vinny380

Dobbler Effect Question ! Question: The Dobbler Effect, using ultrasonic waves of frequency of 2.25 *10^6 Hz is used to monitor the heartbeat of a fetus. A beat frequency of 500Hz is observed. Assuming the speed of sound is 1.54 *10^3 m/s, calculate the maximum velocity of the surface of...

why double?

Question: When you walk with a cup of coffee (diameter 8cm) at just the right pace of about 1 step per second, the coffee sloshes more and more until eventually it starts to spill over the top. Estimate the speed of the waves of the coffee. Relevant Formulae: f= 1/T v= f * wavelength...

mechanical potential energy ?

Potential and Kinetic energy?

so I should use this for B : (1/2)mv2 + (1/2)Iω2 ??

The length of a simple pendulum is .760m, the pendulum bob has a mass of .365 kg, and it is released at at angle 12 degress to the vertical. A. Find the frequency. Assume SHM. B. What is the pendulum bob's speed when it passes through the lowest point of the swing C. What is the tot al...

anyone there ?? please help!

i know that the acceleration must be negative ... considering wf=0 ... and -w1^squared= 2Atheta

would 1500 revolutions = 3000 radians? or am i totally off

i am really confused... i don't even know if i got the angular velocity right ... 5340 revolutions per second seems so much ... ?

thanks Euclid ... so I got an angular velocity of 5340 rev/sec ...but how would I figure out the time since a= change in angular velocity/time

Question: A cooling fan is turned off when it is running at 850 rev/min. It turns 1500 revolutions before it comes to a stop. A. What is the fan's angular acceleration? B. How long does it take for the fan to come to a stop? I am pretty stumped with this question. I know that I have to...

thanks radou!

well...if the center of mass is 3.83L ... then wouldn't the center of mass be out of the object given (which is impossible)?