# Recent content by nishantve1

1. ### Force required to keep a wooden block from sliding on a rough incline

@Doc Al It's actually a Test prep book published by a very well known publisher in my country at least . This question was part of the actual test held in 2012 . The question goes like The minimum force required to move a body up an inclined plane is three times the minimum force required to...
2. ### Force required to keep a wooden block from sliding on a rough incline

Homework Statement This thing was a part of an entire question . I solved the other parts but I don't know why I am messing up here . Force required to keep a wooden block from sliding on a rough incline with coefficient of friction μ Homework Equations Force on a block on an...
3. ### Matrix and inverse matrix question?

How did I miss that . Thanks
4. ### Matrix and inverse matrix question?

Homework Statement how do I solve this question https://www.dropbox.com/s/bn958xnm5483s6u/photo%20%281%29.JPG (This link if the image is not visible : https://www.dropbox.com/s/bn958xnm5483s6u/photo%20%281%29.JPG) just so the equation is not clear it says A2 = λA - 2I The inverse should be...
5. ### Probability question regarding independent events, where am I wrong ?

Homework Statement E1 and E2 are two independent events. The probabilities of an error in judgement by a person regarding E1 and E2 are 0.02 and 0.05 respectively. Find the probability that the person will take the correct decision regarding : only one event Homework Equations Two events...
6. ### To prove that vectors (a + b) . (a - b) = a^2 + b^2 iff

@Pranav The question is correct
7. ### To prove that vectors (a + b) . (a - b) = a^2 + b^2 iff

Homework Statement The question says : Prove that (\vec{a} + \vec{b}).(\vec{a} - \vec{b}) = \left | \vec{a} \right |^{2} + \left | \vec{b} \right |^{2} if and only if \vec{a} \perp \vec{b} Homework Equations This is known that \left | \vec{a} + \vec{b} \right | = \left | \vec{a} -...
8. ### Estimate the number of electrons flowing in a semiconductor pn junction

Homework Statement The drift current in a p-n junction is 20μA . Estimate the number of electrons crossing a cross section per second in the depletion region. Homework Equations Drift current is the current that occurs due to formation of holes and electrons in the depleted region from...
9. ### [Ma4b2] Isomerism in coordinate complexes cofusion

Bummer! should've had checked once, yea they are the same.
10. ### [Ma4b2] Isomerism in coordinate complexes cofusion

Consider a complex with Central Metal atom M A and B are monodentate ligands . Consider a compound with formula as [M A4 B2] . Textbook and the web says there can be only 2 possible isomers of this compound . What I say is, why can't I in the first image put A on the top and bring B...
11. ### Can a volume of gas exert pressure on itself ?

Thanks everyone I got it finally !
12. ### Can a volume of gas exert pressure on itself ?

So, I was going through the solved problem sets and encountered this question which is to find the relation between two ends of a cylinder filled with gas rotating about a vertical axis fixed at one end (the red axis) . I understood the solution but there is one thing still confusing me...
13. ### Difference between ionic and molar conductivity ? (Electrochemistry)?

So,Activity is the effective concentration - i.e. that portion of the ions which are free to take part in a given reaction - It becomes proportionately less as the concentration increases. So that means if I increase concentration number of ions taking part in electrical conductivity decreases...
14. ### Difference between ionic and molar conductivity ? (Electrochemistry)?

That's called the Cell constant. Cell constant = l / A l is the distance between the electrodes and A is the area of the electrodes . I am still confused here, how come the conductivity decreases on decreasing concentration but molar conductivity increases ? Looking forward to a...
15. ### Difference between ionic and molar conductivity ? (Electrochemistry)?

@Borek I am a little confused here, Heres what my textbook says "Conductivity always decreases with decrease in concentration of both strong and weak electrolytes.This can be explained by the fact that the number of ions per unit volume that carry the current decreases on dilution" Now...