Recent content by bruceflea

how good an insulator is asbestos? (thermal conductivity 0.15 W/ m K). I am trying to determine the thickness of insulation required to reduce the heat loss of a spherical container by half. The answer I calculated it to be is 0.2cm which to me doesn't seem right (too small?) but having no...

For a, Velocity of the water increases as there is no longer friction with the pipe. For a constant volumetric flow rate the area has to decrease as the velocity increases.

Water flows from a garden hose. If the end of the garden hose is turned downward, a steady stream of water is seen to emerge from it. Upon closer observation, it can be seen that the flow of water is wide when it has just emerged from the hose pipe, and becomes more narrow as it descends (see...

Thanks, makes perfect sense. Just to make sure I understand this here's another siphon situation. http://img427.imageshack.us/img427/1121/siphon22ho.th.jpg The entrance of the siphon is at the bottom of the tank and the exit is below the tank. For this situation would the pressure...

A siphon is used to empty a large vessel of water (see picture). Calculate/state the intial (absolute) pressures at points 0, 1, 2, 3, 4 and 5. http://img499.imageshack.us/img499/8104/siphon1oq.th.jpg P0 = 1.013 x 10^5 Pa - the pressure exerted on the water by the atmosphere P1 = Po +...

As part of my chemical engineering degree I have to do a module called fluid flow. Turns out I'm pretty bad at it. I'm trying to find a book which covers as much of the module as possible, with plenty of worked examples. The syllabus: Introductory concepts of fluids, units & dimensions...

P1*v1/t1 = P2*v2/t2?

A frictionless piston-cylinder device initially contains steam at 200 kPa, 200oC and 0.5 m3. At this state, a linear spring (F ∝ x) is touching the piston but exerts no force on it. Heat is now slowly transferred to the steam, causing the pressure and the volume to rise to 500 kPa and 0.6 m3...

It's seems like such a basic question but I can't for the life of me remember how to do it.Given the points A(0,0,1), B(2,3,2), C(1,0,0) and D(2,2,1), verify that the line through A and B and the line through C and D intersect and find the point of intersection P. Find the equation of the line...

question: The buoyancy force that pushes the balloon upward is proportional to the density of the cooler air outsider the balloon and the volume of the balloon, and can be expressed as force buoyancy = denisty(ofcoolair)*g*volume(ofballoon) where g is the gravitational constant...

1st year physics help - hot air balloons... see next post...