Recent content by yellowgators

Homework Statement The organ pipe is 2.0 m long, was open at both ends, and was originally tuned to a fundamental frequency of 128 Hz (C below middle C). a) what is the wavelength of the fundamental? b)if the note you now hear is closer to 262 Hz (middle C), where is the blockage with...

Part C: Volume-tank=h(pi)r^2=10m(pi)(5m)^2=785 m^3 Volume-tank/(delta-V/delta-t)=t t= 6.89s Part D: To find v_2: continuity equation v_1(A_1)=v_2(A_2) Therefore v_2=(v_1*A_1)/A_2= [6.0m/s(pi)(0.05m)^2]/[pi*(0.025m)^2]=24 m/s Bernoulli's equation adjusted to a constant height...

Looking over Part B again I realize that Poiseuille's law will give me the units I want and includes the viscosity of the water. (delta-V)/(delta-t)=[(pi)/8]*[((delta-P)/L)/(eta)]*r^4 All values are given except the change in pressure, delta-P. The pressure at one end of the pipe is 1.95x10^5...

https://www.physicsforums.com/showthread.php?p=1822741#post1822741"

Homework Statement A large storage tank (diameter 10m) is filled 10m deep with water (density= 1000 kg/m^3, viscosity= 1.0x10^-3 Pa*s). The outlet at the bottom consists of 2 pipes, as shown. The large pipe has a diameter d2= 0.1m, and the smaller have a diameter d3= 0.05m and length of 20m. A...

I double-checked my method versus the method using beta to find the final volume of the pyrex container. The final volumes are not equal using both methods; the volume of the one I used is larger. This makes sense because beta would be used, in this case, for a solid cylinder of Pyrex. A solid...

Homework Statement A Pyrex container is filled to the very top with 40.0L of water. Both the container and the water are at a temperature of 90.0 degrees C. When the temperature has cooled to 20.0 degrees C how much additional water can be added to the container? Homework Equations...

Your pressure needs to be converted into Pa to get the right units.

Looking at the question again, I realize I misread it. It asks for the direction of the angular momentum before and after the skaters collide with the rod. I don't understand how there could be angular momentum before the skaters touch the rod, because the rod is not moving, so omega would...

I looked over that method. Thanks! Using the law of conservation of energy is more straightforward than how I approached the problem. That will be helpful for future problems.

Homework Statement An ice-skater, with a mass of 60.0 kg, glides in a circle of radius 1.4 m with a tangential speed of 6.0 m/s. A second skater, with a mass of 50.0 kg, glides on the same circular path with a tangential speed of 5.0 m/s. At an instant of time, both skaters grab the ends of a...

Thanks!

Homework Statement An ice-skater, with a mass of 60.0 kg, glides in a circle of radius 1.4 m with a tangential speed of 6.0 m/s. A second skater, with a mass of 50.0 kg, glides on the same circular path with a tangential speed of 5.0 m/s. At an instant of time, both skaters grab the ends of a...

Homework Statement A Vulcan spaceship has a mass of 65,000 kg and a Romulan spaceship is twice as massive. Both have engines that generate the same total force of 9.5 x 10^6 N. Neglecting any changes in mass due to whatever is expelled by the engines, calculate the kinetic energy and momentum...

you may want to go back first to where you substituted values into your original equation. what is the velocity of the catcher when the runner collides with him? if it's zero, it will cancel out the mass of the catcher entirely from the first part of the equation. also, maybe there's an...