xX_Supaman_Xx

Most popular questions and responses by xX_Supaman_Xx
1. Physics - Electricity

Can you please check my answers. 1) What carries energy through wire? electrons 2) What happens to some of the energy when it moves through the wire? becomes lost due to the movement of energy requiring some kinetic energy 3) If a resistance is large, why

2. French

What is the main linguistical difference between the phrases; 1. Je m'en vais and 2. J'y vais

3. chem

In the formation of sulfur hexaflouride, does the reaction at constant pressure or volume proceed more spontaneously? I've done the calcs to show that at constant volume, it is slightly more spontaneous, but I can't seem to find a good reason why... it

4. Mathematics

Solve the following differential equation, i.e. solve for y: dy/dx - y/x = 1/x + y + 1 I have this so far, 1. dy/dx= (y + 1 + xy + x)/x 2. x dy = (y + 1 + xy + x)dx 3. Integrate both sides... xy + c = xy + x + .5x^2y + .5x^2 + k where c and k are constants

5. Mathematics

Solve d/dx x(ln(x)-1) I had: =d/dx xln(x) - d/dx 1 =d/dx ln(x)^x =x^(-x-1) [and this is wrong] Can someone show me the correct answer and working please?

6. French

Can the words "les hommes du maison" be translated to both "the men of the house" and "the men from the house" or just one of them?

7. drwls & Damon - maths

hey guys, i follow you up to the point of intergrating the final line. How would I intergrate [x^-2.e^-x] dx thx

8. Maths-Logs

when writing log b to base a, (log-a(subscript)-b), can a be less than 0?

9. Chem

In thermodynaics, what is the relationship between enthalpy (H) and heat (q) - [at constant pressure]?

10. Mathematics

Differentiate ln(x)-1 I have d/dx lnx-1 = d/dx(ln x)- d/dx1 = d/dx(ln x) = 1/x Could you tell me if this is right or not? If not, please suggest the right working out.

11. Reposted: Maths - Trig

I've been told that sin(c+h)=sin(c)xcos(h)+cos(c)xsin(h) but how? please explain

13. Physical Chemistry

In terms of bomb calorimetry, can one assume the temperature of the water surrounding the cmopartment is equal to the temperature within the compartment? If not, how would one determine T for the reaction occuring inside the compartment?

14. maths

how would i solve the differential equation dx/dt=-kx^2 i.e. solve for x as a function of t. I've been told to rearrange the equation to yield dx/x^2=-k dt but what can and should I do now?

15. Sport - Football

In FLAG FOOTBALL, how many players are allowed on the field at one time and what are their positions' names? Please help, I'm in Australia and Football just ain't as big as it is in some other countries.

1. Math

d/dx x^2+3x = 2x+3

posted on December 5, 2007
2. CHEM

HOCl forms from OCl- + H+ and vice versa. the anion is hypocholrite (OCl-). Given the attaching proton is positively charged and out of O and Cl, O is more nucleophilic (Cl has the highest electronegativity), the H will attach to the O atom making the

posted on November 10, 2007
3. math

see my other response

posted on November 10, 2007
4. math

diameter= sqr[(6^2+(-2)^2)+(4^2+0^2)] therefore, radius= (sqr[(6^2+(-2)^2)+(4^2+0^2)])/2 = ?

posted on November 10, 2007