Homework Statement
Prove that 5^(2/3) is irrational
Homework Equations
The Attempt at a Solution
I tried writing a proof but that is not getting me any where.
This is what I did so far -
Show that 52/3 is irrational
Proof: Suppose that 52/3 is rational:
52/3 = a/b...
Homework Statement
Which process, the formation of the chloro complex, or the formation of the aquo complex, is endothermic?
Co(H2O)62+ (aq) + 4Cl- <---> CoCl4 + 6H2O (l)
Pink ----------------------------- Blue
The Attempt at a Solution
The reaction above is endothermic because it turned...
Homework Statement
A rocket at rest in space, where there is virtually no gravitational force, has a mass of 2.55 * 105 kg, of which 1.81*105 kg is fuel.The engine consumes fuel at the rate of 480 kg/s and the xhaust speed is 3.27 m/s. The engine is fired for 250 s.
Find the thrust of the...
I know this is wrong because there's no way the answer can be this simple ...
W=F.d
-4 = mgsin30 * d
d = -4/20sin30
d = -.4
.4 to the left
is that even righttt?
Homework Statement
http://img137.imageshack.us/img137/9280/43448180.jpg [Broken]
find distance for gravity to do only -4 J of work
Homework Equations
[PLAIN]http://buphy.bu.edu/~duffy/PY105/12m.GIF
Wg = mgX
The Attempt at a Solution
Can anyone help me from the first stepp
A .50 kg block sliding on horizontal frictionless surface is attached to one end of a horizontal spring (with k = 500 N/M) whose other end is fixed. The block has a kinetic energy of 20J as it pass through its equilibrium position (the point at which the spring force is zero.)
what is the speed...