Hi, normally when we try to analyse a structural beam with composite section, we apply transformed section method or so. But what if two beams are just put together (one onto another one) instead of having a composite relation (e.g. glued together), how am I going to analyse the forces and...
Hello everyone.
I have a question about compressive strength of concrete. It is said that (in my country) 150 mm x 150 mm x 150 mm concrete cube is used for concrete testing. Someone asks me why 100 mm x 100 mm x 100 mm is not used. In fact, I know that sometimes it is allowed or even prefered...
I have a question about the XOR gates. Are those XOR gates for doing 2's complement (i am thinking in this way)?
But I know that 2's complement is not just inverting 1 and 0, but also needs to add 1 after that. It seems that the above design cannot do that?
Homework Statement
Hi, it's me again.
Now I am going to design a 4-bit magnitude comparator using just ONE 4-bit adder and infinitely large number of gates (AND, OR, NOT, NAND, NOR, XOR, XNOR) for signed numbers (negative binary).
Homework Equations
A > B => A3barB3 + A2barB2x3 +...
Homework Statement
Okay, This time it's an exam question. I am doing some past papers and there are questions about comparators which are not introduced in this course (this course is preliminary course for engineering students who are interested in electrical, electronic or computer...
If it is HT, then no matter the next one is T or H, TH already occurs before HH, right?
If it is TT, then also no matter the next one is T or H, TH already occurs before HH, right?
If it is TH, then obviously no matter the next one is T or H, TH already occurs before HH, right?
Just the case if...
Homework Statement
A fair coin is continually flipped. What is the probability that the pattern T,H occurs before the pattern H,H, where T and H respectively denote Tail and Head of a coin?
Homework Equations
Prob. = (n r) (pr)(1-p)n-r
The Attempt at a Solution
I am thinking whether the...
I understand 1st and 3rd question now.
For 2nd question,
my approach now is
let p be the P(accpetable) in 1st question.
P(more than 2 tests) = 1 - [ P(1st acceptable) + P(1st rejected, 2nd accpetable) ] = 1 - [ p + (1-p)p ]. Is this correct?
Homework Statement
Due to the pollution from the industry around an apple farm, the apples grown there may be contaminated by heavy metals. It is believed that the amount of heavy metals in an apple of the farm follows the Normal distribution.
N(16,16) which has a mean μ = 16 units and σ = √16...
Homework Statement
Given sin x = (eix - e-ix) / 2i,
I want to prove that
arcsin x = -i ln(ix + √1 - x2)
Homework Equations
I know about the Euler's formula and complex number. But I have never learnt about complex logarithms.
The Attempt at a Solution
I try to use x = sin y. But it seems...