Recent content by willem2

One of the reasons that python is slow, is that any variable can be any object. This will make it necessary to check the type of the object on any read of a variable, and then you need to fetch the data of the object (stored elsewhere in what might be a random location, potentially causing a...

The answers are the same. both give t = C*V/I. I don't understand what the problem is

Here are 2 solutions with 7 infinite cylinders. https://www.sciencedirect.com/science/article/pii/S0925772114000819 Major computation is needed to find solutions of 20 non-linear equations with 20 variables. The only thing in that article that's easy, is that if you have 2 parallel infinite...

(3) is obviously not true. According to your definition no set of 3 vectors with 4 components can be linearly independent.

A set of vectors is linearly dependent if it contains the zero vector, or if you can produce the zero vector by making linear combinations of the vectors. A zero column only implies that you can produce a zero row if the dimension of the vector space (number of elements) is equal to the number...

You didn't try to move the circle. The problem statement doesn't forbid this.

But here the tv screen here is not tilted. Guessing a distance from the screen of 1m, the distance to the first maximum of 0.05 m and light with a wavelength of 600 nm, You need 83 pixels/mm. I think mobile phones come close to that nowadays. Of course we also need the size of the monitor...

Yet, the golf ball won't deform very little, during the time it falls. The acceleration of the tidal force is only 400000/0.045 = (0.045 kg golf ball) = 8.9 * 10 6 ms -2 (1/2)at2 = 0.01 mm.

Actually, this can be done without quadratic equations. If you get your equation in the form: cos(a) = cos(b), you can conclude a = b+2k pi or a = -b +2kpi. no double angle formula's or quadratic equations required.

This is just Charles law (V/T is onstant at constant pressure), with T expressed in degrees Celsius, so you get (T+273.15) in the expression, instead of t

I don't know why you think this will happen? This depends on the exact battery chemistry, but at least with rechargeable batteries, this will charge the battery with the lower electromotive force, and it will raise its emf until the emfs of the batteries are the same. If R is large enough, this...

The best known way to find large primes is the lucas-lehmer test for mersenne primes (primes of the form 2^p-1 where p is a prime). This is actually quite simple to do # returns True if 2**p -1 is a mersenne prime, false otherwise # assumes p is prime def is_mersenneprime(p): if p==2...

We need some examples here. what happens if 2a becomes greater thant b-a, do you then exchange an and b? i don't see when a pair draws. It does seem like the computation of does_draw() is the problem. You could use a table or the @cache function decorator to not compute this function over...

This is a calculation of the impulse response of a second order linear system (mass - spring - damper). Are you allowed to use the Dirac delta function? in that case the right side of the differential equation is just δ(t), and you can use the laplace transform. A an equation with f(V'', V', v)...

No these are the correct notes, starting with the last beat of measure 32. On measures 17-32 the shift register is reset every beat of the kick drum, and the last beat of measure 32 is the last time this happens. I've noticed the following looking at this shift register. - A bit shift register...