Recent content by johann1301h

Thanks for the response, but as I wrote in the OP, this book skips the topic of implicit error margins. (based on my initial reading)

Are there any good textbooks covering this?

The book I am currently reading is Serway Physics for scientists and engineers. It does not address the topic of implicit error margins, but does address how to calculate error from a non error margin number set.

WARNING: Topic is very pedantic. I have used a set of different physics books over the years, and they have all had a focus on the topic of significant figures, error margins and measurement. I have never quite understood these concepts fully and the relationships between them. One aspect I...

I am trying to gain some perspective into the topic of «number of valid digits» when doing physics problems. I have been doing physicsproblems for å long time, but i have never really understood why the rules regarding number of digits to include in the final answer - is the way that it is. I...

So I just connected a zinkplate and a copperplate in series with a battery 9v and a coil(with a an iron core). All the parts are from a set bought for learning about electricity. Since I was a kid I have many time put the + and the - of a 9V battery on my tongue, and felt the electricity. So...

Thanks!

Is it a dumb idea to try drying the wall, the pen and the paper with a blowdryer?

The wall(s) I have tried are painted. So I'm guessing its the humidity then...

Hi! Im trying out an experiment, where a newspaper page is supposed to stick to a wall using a wooden pencil, by rubbing the pencils long side on the newspaper page while its on the wall. But its not really working. I have checked the pencil, and there is no coating on it, just wood. It is...

I guess I'm curious to how an electron actually moves inside a wire, and I know we can't know exactly where it is, but I guessed you could make a simulation on how the probability distribution for one electron changes along the wire/along a grid of atoms... And if the scrødinger equation can...

(I have very little training in Quantum mechanics) Can the Shrødinger equation show the probability distribution of the electron when it jumps from one atom to another, like in a circuit f ex. Thanks!

orthogonality: 90 degrees, orthonormal: 90 degrees and length = 1unit ?

Let's say we have n vectors in ℝ3. And say we have defined a subspace inside ℝ3 in the form of a sphere with radius r, and the center of the spheare is at P, where P is a vector in ℝ3. What methods exists to find any linear combination of the n vectors, so that the sum of all of them, lies...