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Mixing ideal gazes and entropy

I have a question , we we mix 4 ideal gazes, does the entropy change? I though not, because they are -ideal- . But then I started to doubt myself

I promise this is the last question physics I ask you haha

A 0.670 m long solenoid is formed by wrapping 580 turns of wire around a hollow cylinder with a radius of 0.250 m. At the instant when...

Here is is again http://imageshack.us/m/819/2563/rxny.jpg

I found what was wrong with me :)

For this reaction what are the products that I can get I got already two I'm sure there are another 2, they are alkenes, but I do not know hw to get them.

http://s3.postimage.org/nr4jq7biv/rxn.jpg

Rectangular loop with sides of length a= 1.30 cm and b= 3.80 cm is placed near a wire that carries a current t?
*** a rectangular loop with sides of length a= 1.30 cm and b= 3.80 cm is placed near a...

How is that related to solvents .

Sorry I\m writing with capital letters, I have a problem in the keyboard haha .

Well, in my question is , organic chemistry ,

In sn1 and sn2 , we know that leaving group order is like this ...

I was asked to draw
(S)-5-heptyn-3amine
I know how to draw it, but , what does the (S), means!

I got it thanks :)
I was confused because I related it , with the syn and the anti !
Haha I thoght the antimark.. is an addition to some side rather than other side.. something like that..

What the difference between anti markovnikov rule and markovnikov rule, and when the anti markovnikov happens. Is it only when , there is BH3,THF/H2O2, OH- ?
I can understand if u explain it...

http://s4.postimage.org/nxozyjlmf/stan.jpg

Which conformer is more stable of both and why
http://s4.postimage.org/nxozyjlmf/stan.jpg

A point charge moving in a magnetic field of 1.24 Tesla experiences a force of 0.813·10-11 N. The velocity of the charge is perpendicular to the magnetic field. In this problem, we use the points of...

01221 I got it :)

Five particles follow the paths shown in the figure as they pass through a magnetic field B, which is indicated by the dots or crosses in the figure. What can you conclude about the charge of each...

What is the total energy dissipated by the resistor R after the switch is thrown?
Consider the RC circuit in the figure below. The switch was at position a for a long period and it is suddenly...

Consider the RC circuit in the figure below. The switch was at position a for a long period and it is suddenly switched to position b at time t = 0.
...

thanks, I need to crorrect , now
I used I= 2epsilon/(R+2r) = 6/(29+0.56*2 ) = 1.99E-1 A

well I solved all the questions ex[ect of the last one..

I need a help

A battery with an emf of 3.00 V has an internal resistance r. When connected to a resistor R, the terminal voltage is...

I got it it's 0 N :)
No need to answer it

A parallel plates capacitor is connected to a battery with emf 13.0 V. The width of the plates is 4.0 cm, the length is 5 cm. And the distance between two plates is 0.005 mm (the distance is much...

A parallel plates capacitor is connected to a battery with emf 13.0 V. The width of the plates is 4.0 cm, the length is 5 cm. And the distance between two plates is 0.005 mm (the distance is much...

It means that I got a full answer in the exam ;)))))))))))))))))
Thanksssssssss

just want to know if I'm correct

lim (x^4)Sin(1/x) / sin^2(X)
x->0

is zero .

------------------------------------
lim x(sqrt(1+4x^2) +2x)
x->-infinity

Thanks dear :)

what is the integral of |lnx| , between (1/e) to e

I know the integral of lnx = xlnx -x

so what I did was [{(elne-e - (1ln1-1)]} + {(1ln1 -1 ) - 1/e(ln1/e)} ) ].. sadly I got a wrong answer.. ...

Sorry , no need to answer my question... my anwer is right but there was a problem with the computer

A 6.28 μC point charge is placed at the center of a cube with a volume of 8.13 m3. Calculate the electric flux through one side of the cube.

here is what I tried to do :

electric flux =...

OK , but, what is (alpha1, and what is alpha2)
Thanks :)

Two charges, Q1= 3.60 μC, and Q2= 6.40 μC are located at points (0,-3.00 cm ) and (0,+3.00 cm), as shown in the figure.
What is the magnitude of the electric field at point P, located at (4.50...

I just want to tell you that in my physics course which is 8 points, I got 99/100, and I want to thank you, for letting me think , and because you never just gave me the answers .
I really worked...

Vector operations: so I need help to know when one is true or false.
The x-component of a vector can be (+),(-), or zero
A × C = C × A
The scalar (or dot) product of two vectors can be (+),(-),...

What cells are effected in multiple sclerosis is it the schwann cells or the oligodendrocytes? Or both ?

A problem in Vermiform appendix, what organs it may can affect ?

Duodenum
Jejunum
Ileum
Transverse colon
Ovaries
Stomach

(I think all of them expect of ovaries right?)

lim (cosx)^(1/x^2)
x-->0

No need to answer I got it :)

how to gwt
lim( tanxlnx)
x->0

I tried but , it did not work with me.

I asked about arcsin x =?
not arcsinhx

What the difference between them

As well as what the difference bettwen coshx and arccosx

Duh?!

Pressure Drop
A straight horizontal garden hose 22.0 m long with an interior diameter of 2.50 cm is used to deliver 20oC water at the rate of 0.490 liters/s. Assuming that Poiseuille's Law...

Terminal Velocity
A sphere r = 1.30 mm and mass = 124.2 mg is dropped into glycerin with density, ρ = 1260.0 kg/m3, and viscosity, η = 1.49 Pa s. Find the terminal velocity of the sphere.
(in...

Playing Pool A uniform billiard ball with radius R= 7.00 cm rests on a billiard table. At one moment, the b? P?
Playing Pool A uniform billiard ball with radius R= 7.00 cm rests on a billiard table....

Carrying Drywall
Two builders carry a sheet of drywall up a ramp.

Assume that W = 2.00 m, L = 3.20 m, θ = 25.0°, and that the lead builder carries a (vertical) weight of 155.0 N (34.8 lb). What...

Playing Pool
A uniform billiard ball with radius R= 7.00 cm rests on a billiard table. At one moment, the ball received a hit from the horizontal direction. Hit point is h above the center of the...

you really gave me the way to understand the question, I solved it without looking at the last part ; ) haha
thanks

I have a question
about this Kr = (1/2)*I*w^2, here I = (1/2)*m*r^2.. is it...

Spring Constant
A thin uniform rod has mass M = 0.5 kg and length L= 0.37 m. It has a pivot at one end and is at rest on a compressed spring as shown in (A). The rod is released from an angle...

Rotating Mass M, a solid cylinder (mass = 1.39 kg, r = 0.100 m) pivots on a thin, fixed, frictionless beari?
Rotating Mass
M, a solid cylinder (mass = 1.39 kg, r = 0.100 m) pivots on a thin, fixed,...

Spring Constant
A thin uniform rod has mass M = 0.5 kg and length L= 0.37 m. It has a pivot at one end and is at rest on a compressed spring as shown in (A). The rod is released from an angle...