I wondered if someone could do this for me so that i can use it as an example to learn from, it is from a past paper for an exam i will be sitting soon.
Suppose that a sky diver steps out of an aeroplane at an altitude of 10,000ft and that his downward acceleration is given by:
dv/dt = 32...
Hi I'm learning laplace transform, specifically multiplying by 't' and 't^n'. Now i understand the concept that L{tf(t)} = -F'(s) but I'm confused with the differentiation part of the process (having a bit of a dim moment!).
Here is the example it gives:
L{sin2t} = 2 / (s^2 + 4), therefore...
I have this queston:
The flow rate in a pipe is assessed by measuring the speed of rotation of a propeller having its axis along the pipe centre-line. Show by dimensional analysis that the volume flow rate, Q, is given bu the expression:
Q=(D^3).N.Phi.(d/D,(density.(D^2).N)/viscosity)...
I re-worked it out and found that i had used of the length of the pipe in Reynolds EQn rather than the diameter. So i now get Reynolds to be about 2.8 x 10 to the 4. Which gave me a more realisistic head of 4.95m. So thanks again for your help.
PS i like you quote, its so true!
Just checking
So I wondered if you could tell me what I worked out now is correct...
I got that Reynolds number is 1.43 x 10-4, and that therefore f equals 0.0275
This then gave me a value of 18.79m approx. for the difference in height.
Does this look rounghly right?
I'm stuck with this problem, can anyone help me please?
Two large tanks are connected by a cast iron pipe 50mm in diameter and 50m long. There are eight 60 degree and four 90 degree bends along the length of the pipe. The inlet to and the exit from the pipe are abrupt and the rate of flow of...