Recent content by Matt21

Homework Statement In an experiment similar to Thomson’s, we use deflecting plates 5 cm in length with an electric field of 1.0×10^4 V/m. Without the magnetic field, we find an angular deflection of 30°, and with a magnetic field of 8×10^-4 T we find no deflection. What is the initial velocity...

Yes that was the equation was trying to convey. In regards to y(xk) I would assume that means y*(xk) where xk = x1, x2, x3...xk

Yes I'm positive. The formula given in my notes was √((1/n-2)(Σ(yk - y(xk))^2)

Homework Statement Three points are given with errors on y coordinates. (2.00,4.70±0.36); (4.00,6.8&±0.45); (5.00, 9.10±0.50) Using LSQ method, find the error on slope. Homework Equations σm = σy√(n/Δ), where σy = √(1/n-2(Σ(yk - y(xk))^2)) and Δ = nΣxk^2 - (Σxk)^2 The Attempt at a Solution I...

Okay sounds good. Thank you very much for your help.

It is an online prelab question I need to answer. Maybe it has to do with significant figures?

The answer I got was 0.788m which is 78.8cm. It says this is incorrect which doesn't make sense.

Do I need to use distance x in m and then convert my answer for y back to cm? Because I've already done that and it still gives me the wrong answer. y=(0.000003*6760*0.933)/(2*0.000007*40^2)

Homework Statement On the diagram, a charged particle of charge 0.000003 C and mass 0.000007 kg moves across the electric field 6760 V/m with initial speed 40 m/s. When its x coordinate is 93.3 cm, its y coordinate is (in cm)? Homework Equations y=(e*Em*x^2)/(2*m*v^2), where Em is electric...

When plugging in the values that I have into the equation I get Lo = L/((0.900c)^2/c^2) = L/0.316. Unless I did something wrong, I'm wondering if this is the right answer because it certainly doesn't seem like it.

Homework Statement This is a question asked in a entrance examination[/B] A spacecraft moves at a speed of 0.900c with respect to the ground. If its length is L, as measured by an observer on the spacecraft , what is the length measured by a ground observer? Homework Equations observed...

Homework Statement The magnetic field in the middle of a solenoid of length L= 40cm and area of the cross-section A=12 cm^2 is B = 3 mT. The current through the solenoid is I = 4 A. What is the number of turns in this solenoid? Homework Equations BL=μ0*n*I =(4πx10^-7)*n*I The Attempt at...

Homework Statement In a AC to DC rectifier the DC signal was Vdc= (6.3+0.4)V and AC signal was Vac=(0.25+0.04)mV. What is the error on the quality factor of the rectifier? Homework Equations σQ=√((σr^2)/(Vdc^2 )+(Vr^2 σdc^2)/(Vdc^4 )) The Attempt at a Solution I know this is the correct...

Homework Statement In a simple RC circuit the current as a function of time behaves in the following manner: I(5s) = 8.823 I(10s) = 7.788 I(20) = 6.065 I(30) = 4.724 I(40) = 3.679 I(50) = 2.865 I(60) = 2.231 I(70) = 1.738 I(80) = 1.353 I(90) = 1.054 I(100) = 0.821 I(110) = 0.639 Assuming...