Recent content by Fleet

Homework Statement I have an "abstract" problem. Calculate the maximum cooling capacity for forced air cooling of a room. The room contains two computers that each has a energy usage of 1 kW. v_air_in=75m^3/h v_air_out=30m^3/h Homework Equations As the cooling is done by ventilation...

Thanks for the clarifications. The normal reaction force is directed upwards at both top and bottom, right? So Fn is less than gravity on the top and bigger than gravity at the bottom? What exactly makes the normal reaction force change magnitude?

Homework Statement I have to find the mass m of a person riding a ferris wheel sitting on a bath scale. Given data: R=16 m Scale reading on top of ferris wheel = 510 N Scale reading at bottom of the ferris wheel= 666 N Homework Equations F=ma For uniform circular motion we have...

Homework Statement A certain music instrument consists of a stick of wood placed horizontally and a resonance "tube" (see attached picture, which is from the original assignment-paper) placed vertically under the stick of wood. When the wood-stick is hit, is creates a standing wave, which is...

Thank you very much for you answer, I really appreciate it! Yes, you are right I get the cases I want. But are you questioning to be ironical or are you sure it the correct way? :) Love this forum, I'm going to contribute Best regards

Hi all, I have found the "generic" form of the FLRW metric: ds^2=(cdt)^2-dl^2 And I have found the three-dimension spatial metric for euclidian space (K=0, spherical space K=1 and hyperboloid space (K=-1): dl^2=a^2(dr^2+r^2d\Omega^2) dl^2=a^2(\frac{dr^2}{1-r^2})+r^2d\Omega^2)...