# Aryaa

Popular questions and responses by Aryaa
1. ## Differential Equations

solve the following differential equations dx/dt - 7x + y = 0 -->(1) dy/dt - 2x - 5y = 0 -->(2) (2)/(1) dy/dx = (2x+5y)/(7x-y) y=vx Etc. Is this a correct way to solve this one?

2. ## Probability

Let X denote the time in hours needed to locate and correct a problem in the software that governs the timing of traffic lights in the downtown area of a large city. Assume that X is normally distributed with mean 10 hours and variance 9. (a) Find the

3. ## Java Programming

How do we print, _ _ _ _1 _ _ _2 1 _ _3 2 1 _ 4 3 2 1 In Java? Please help, I don't know how to get started

4. ## Maths

Prove that (grad)^2 f(r) = D^2/dr^2 + (2/r) Df/Dr Where D^2/dr^2 refers to the second partial derivative of f , w.r.t. r and Df/ Dr refers to partial derivative of f, w.r.t r vector r = xi + yj + zk and f(r) is twice differentiable How do we start with

5. ## Email

Suppose you have some kind of an disability in your right hand which makes your handwriting unclear... You just finished your semester examination and you are writing a letter to a senior lecturer/professor informing your situation and kindly requesting

6. ## Math

Suppose we have to add 12.5 and 1.25 using fixed point arithmetic 1) integer form Scale factor -2 and 2) fractional form Scale factor 4 Do we consider the decimal point(.) as a digit in each case?

7. ## Math

How do we convert 1111010.11(binary) to decimal by first representing it in BCD form and then converting it to decimal An example given in the note has divided the integer part of the given binary number by 1010 successively and multiplied the fractional

8. ## Differential Equations

How do we solve d^2/dx^2 + y = sinx*sin 2x How do we simplify the RHS to the form sin(ax+b) ?

9. ## logic pattern proof

Symbolize and test for the validity of the following arguement using pattern proof If u send me a message then I will come to meet you. If you do not send me a message then I will go to China. Therefore either I will come to meet you or I will go to China

10. ## Differential Equations

Solve (D^2-3D+2)y =x(x+4) and show that its general solution is given by y=Ae^x + Be^2x +(x^2/2) + (7x/2) + (19/4) My work : auxiliary eqn , m^2 - 3m + 2= 0 m=1 , m=2 Reduced eqn : yn = Ae^x + Be^2x P.I. = 1/f(D)*F(x) = (1/(D^2-3D+2))*(x(x+4)) P.I. =

11. ## Chebyshev's Theorem

What is difference between taking the lower bound and lower limit from Chebyshev's Theorem? If P(|Y- mean|)

12. ## Math

Back to Questions Aptitude Question Discussion - PROBABILITY Q. Marie is getting married tomorrow, at an outdoor ceremony in the desert. In recent years, it has rained only 5 days each year. Unfortunately, the weatherman has predicted rain for tomorrow.

13. ## Physics

Two rods of length a and mass m are joined together at right angle to form a T-squre. Show that MI about center of the T pendulum is (17m*a^2)/12 using parallel axis theorem So for the first rod we have a rod hung from an end , so its I=ma^2/3 And the

14. ## Physics

The wizard has a mass of 80 kg and sits 3 m from the center of a rotating platform. Due to the rotation his speed is increased from rest by ˙ v = 0.4 m s 2 v˙=0.4ms2. If the coefficient of static friction between his clothes and the platform is μ s =

15. ## Physics

A point p describes a curve r= ae^(theta) with a constant angular velocityabout its pole Find the radial and transverse acceleration of point P Should we take some value for angular velocity and solve this or?

16. ## Calculus

Verify Stokes theorem for F =(y^2 + x^2 - x^2)i + (z^2 + x^2 - y^2)j + (x^2 + y^2 - z^2)k over the portion of the surface x^2 + y^2 -2ax + az = 0 While evaluating the integral we get hard to evaluate integrals. What can we do to simplify this?

17. ## Math

A straight line l is parallel to a vector a and passes through a point B whose position vector is b. The point C has position vector c and vectoe p os the position vector of the foot of the perpendicular drawn from C to l. Prove that p = [ (c-b)a ]/( |

18. ## Calculus

Could someone explain how do we verify stokes theorem for the vector field F=zi + (2x+z)j + xk taken over the triangular surface S in the plane (x/1)+(y/2)+(z/3)=1 bounded by the planes x=0 y=0 and z=0. Take boundary of the above triangular surface as the

19. ## Calculus

How do we diffentiate in between when to use spherical polar coordinates and cylindrical polar coordinates for a transformation in a vector calculus question(line integral, stokes theorem etc.)

20. ## Calculus

How do we find the parametric equation of the line of intersection of the planes x+y+z=1 and x-y-z=2 ? If we let x=t(parameter) and try solving this eventually y and z terms get cancelled out. How do we do this thrn? Thanks

21. ## Javascript HTML functions - repost

www.jiskha.com/questions/1809344/Create-the-form-structure-shown-in-Figure-2-below-Write-a-JavaScript-function-according

22. ## Javascript HTML functions

ASK Question was successfully created. HTML COMPUTER PROGRAMMING COMPUTER SCIENCE PROGRAMMING JAVASCRIPT You asked • 2s Javascript functions Write a JavaScript function to calculate difference of square values of two numbers passed as function arguements

23. ## Programming

Followup to : www.jiskha.com/questions/1808699/www-jiskha-com-questions-1808481-This-is-a-follow-up-to-www-jiskha-com-questions-1808236-Let-X-denote-the-time-in-hours-needed-to-locate-and-correct-a-problem-in-the-software

24. ## HTML / Web Design

How do we create a checkbox of the following format in HTML? Colors (checkbox icon) red (checkbox icon) green (checkbox icon) red I could only do it as folows : Colors (checkbox icon) red (checkbox icon) green (checkbox icon) red

25. ## To @R_Scott

This is a follow-up to www.jiskha.com/questions/1808236/Let-X-denote-the-time-in-hours-needed-to-locate-and-correct-a-problem-in-the-software So if we take the probability as 0.05 from the left side of the z table, the relavant z value would be -1.64(cause

26. ## Physics

A particle of mass a moves along a space curve defined by r(t) =(4t^2 - t^3)i + 5tj - (t^4 - 2)k Find the torque about the origin. How do we find this, using F*r or I*alpha? To find I we need r^2 , but r changes with time right?

28. ## Maths

Can someone help me with the following? Prove that (grad)^2 f(r) = D^2/dr^2 + (2/r) Df/Dr Where D^2/dr^2 refers to the second partial derivative of f , w.r.t. r and Df/ Dr refers to partial derivative of f, w.r.t r vector r = xi + yj + zk and f(r) is twice

29. ## Calculus

How do we evaluate the volume under the surface given by, z=2xsin(y) over the region bounded below by the curve y=x^2 and above by the line y=0 for 0

30. ## Differential Equations

Solve dy/dx = [ sin(2x+y)/cos(2x+y) ] - 2 and show that sin(2x+y) = e^x is a solution of the above if y(0)=pi/2 I solved the above DE using 2x+y= u substitution to get , ln (sin(2x+y)) - x - c = 0 ; where c is an arbitrary constant. How do solve the next

31. ## Math

Could you check the question please www.jiskha.com/questions/1805638/Question-1-Find-the-perpendicular-distance-of-a-point-C-c-fron-the-straight-line#1914132

32. ## Math

Question : 1)Find the perpendicular distance of a point C=c fron the straight line (r-a)^b =0 2) Find the shortest distance between the two skew lines (r-a)^b =0 and (r-c)^d = Could you please help me solving this? I dont understand how to get started as

33. ## Math

find the volume bounded by the parabolic cylinder z=4-x^2 and the planes x=0, y=0, y=6 and z=0 I just want some help figuring out the limits of this question : So for z, we have to integrate from z=0 to z=4-x^2 (am i right?) W.r.t. y, we should integrate

34. ## Maths

How do we represent the above facts in 1)axiom form and 2)clausal form 1) All babies are innocent 2) Anyone who is innocent and affectionate will be loved by others 3) Anyone who is loved by others, will receive gifts 4) Teena is an affectionate baby My

35. ## Math

Again I'm posting this as I still got no help on this one, though I've posted this several time with my working. Question : Consider the following sentences and prove that "Diana will win the game" 1.All Players are clever. 2.Anyone who is clever and

36. ## maths

I am two digit no above 50 . the sum of my digits is 12. And the difference of my digits is 4 .who am I

1. ## Email

Thanks a lot both of you for the advice

posted on December 9, 2019
2. ## Email

You are sending an email*

posted on December 9, 2019
3. ## Differential Equations

That's d^2y/dx^2 + y = sinx*sin 2x Could you please explain how to get the particular integral of that?

posted on December 5, 2019
4. ## Differential Equations

Is this a compulsory step for all D operator questions, checking whether the general solution works.

posted on December 4, 2019
5. ## Physics

Acceleration given as .4 m/s^2

posted on November 26, 2019
6. ## Calculus

Yes there's a typo : Verify Stokes theorem for F =(y^2 + z^2 - x^2)i + (z^2 + x^2 - y^2)j + (x^2 + y^2 - z^2)k over the portion of the surface x^2 + y^2 -2ax + az = 0 While evaluating the integral we get hard to evaluate integrals. What can we do to

posted on November 24, 2019
7. ## HTML / Web Design

Sorry, the formattings are not kept correctly How do we create a checkbox of the following format in HTML? Colors (checkbox icon) red (Space)(checkbox icon) green (Space)(checkbox icon) red I could only do it as folows : Colors (checkbox icon) red

posted on November 14, 2019
8. ## Probability

How do we get that : 2 s.d below mean?

posted on November 12, 2019
9. ## Java Programming

So there will be no output as there is a syntax error right??

posted on November 9, 2019
10. ## Math

Unfortunately, no one still haven't solved this one? Could you please look into it?

posted on October 29, 2019
11. ## Maths

Yes, D^2f/dr^2 , thats what I meant there?

posted on October 28, 2019
12. ## Math

(r-a)^b = 0 : ^ refers to the cross product , as i know cross product gives a vector perpendicular to both given vectors

posted on October 21, 2019
13. ## Programming

Like this?? for (int i=0; i

posted on October 14, 2019
14. ## Macroeconomics

a) you only have to explain the theory of philip curve, with the help of the diagram of philip curve which shows the trade off between inflation and unemployment in the short run and nairu in the long run, that all. you will get the graph through various

posted on May 19, 2008