Unanswered Forum Posts

Help me for the solution of this problem:

What should be the maximum dimensions of a rectangular open box of a given volume V?

(x²+4) y' + 3 xy = x

What work is done on a level track in bringing the velocity of a train weighing 200metric tons from zero to 45 kph, if the frictional resistance at any velocity is 45N/ton, and if the change in speed is accomplished in length of 1000m? (Ans. 26780.95 KN/m)

C. If the track were a 1% upgrade, what would be the additional work to be done?

Hello,

I'm writing because I have a problem that I don't know how to solve.
I would be thankul if someone could help me solve this problem.

The problem is as follows:

find a general solution

dx/dy =[ -2x (csc 2y – 2x³ cos 2y)] / sec 2y

Who has reviewers here for ECE board exam?

xy' = y + 2 √xy

Help me with this please.

The topic is Additional Topics in Ordinary DE of the first order.

y(3x^3 -x +y)dx + x^2(1-x^2)dy =0

I've been trying to solve the following question for 2 days now and i can't seem to be able to. can someone help me please ?

For the beam shown in Figure 3, the support at A is fully fixed. The beam is tapered however you may consider it to be a beam of 3 varying sections.

Take:
Beam A to B as having 3 times the I value of beam D to end, Beam B to D as having 1.5 times the I value of beam D to end and Beam D to end is 310 UB 46.2 with I = 100 x 106 mm4. Tip: this may be easier to solve using superposition.