Recent content by regisz90

Yes, thank you! Is there any way I can prove that: $$\frac{\bar{R}-R}{\frac{s_2}{\sqrt{N_1+N_2}}}=t_{19,0.05} $$?

We have two groups measuring the same resistors, the nominal value is unknown. Group 1 is slower and because of that they did not calcute the s1 empirical standard deviation. Group 1: N1=500 , R1=6903 , s1=unknown Group 2: N2=20 , R2=6880 , s2=168.3 ,where N1,N2 is number of measurements...

I know that the packages contain different types of components, but i have some about 20-30 years old resistors i want to use, and their size is different than it is of the modern ones in the packages

Im designing a PCB and i need a software that is able to change the size of the components (e.g. the length of the resistor).

its proportional squared, so if the number of turns are N1 and N2, then we get L=k*(N1+N2)^2=k*N1^2 + k*N2^2 + 2*k*N1*N2=L1 + L2 + 2*sqrt(L1*L2). But I don't know how can i use this to solve the problem. The result is the inductance of the two coils together, and they tried to measure them...

squared?

Homework Statement There are two coils wined around the same closed iron core. Their inductances on this iron core are measured to be 4 henry, and 9 henry. Then the two coils are connected in series. What will the equivalent inductance be? Homework Equations ... The Attempt at a...

Homework Statement We have an alpha particle moving in the air (p=10^5 Pa). Its range is "d". What would be the range if the pressure was q=10 Pa only. Homework Equations x=d*(p/q) ? The Attempt at a Solution I think the particle is slowed down the more the more is the number of...

So if we have a spark gap and if the input frequency is 50Hz, it must create an arc 100 times per second?

I need a software for statistics, so it should make plots, fitting curves on points, calculate the uncertainty of measurement etc. Which software do you recommend?

I have to calculate the small oscillations around the equibrillum position. My question is only that is this a physics pendulum so i can use the formula T=2\pi\sqrt{\Theta/mgd} , where d is the distance of the mass centre and the pivot and \Theta is the moment of inertia of the pendulum about...

Homework Statement A bar of length L is hanged by two cords(on the two edges of the bar) of length l in 1 pivot. What´s the frequency of small oscillations arond the stable position Homework Equations T=2\pi\sqrt{\Theta/mgd} The Attempt at a Solution I would try to solve it as a...

thx for help

B=(μ*Q*f)/R Is it the right solution?

Put the expression for the current to the lasst expression for the magnetic field. Then integrate both sides?