Recent content by strawberrysk8

Homework Statement Assume that resistor R has a resistance of 34.2 Ω, inductor L has an inductance of 152 mH (milli-Henry), and the battery has a voltage of 33.7 V. Also assume that the circuit elements are ideal. If the switch S is closed suddenly, the time for the current to attain a...

thx so much!

that still turned out to be wrong. hmm...what else could be the problem? can voltage be negative?

ok... then maybe b) since the strength of the helmholtz coil's magnetic field is larger than the strength of Earth's magnetic field. so the electron will follow a circular path, but along mostly the helmholtz coil's magnetic field

I am leaning towards c) a straight line. I feel like the only way for an electron to move in a helical path is for the two magnetic fields to be diagonally intersecting.

Homework Statement The original direction of the electron beam as it enters the magnetic field is along the earth’s magnetic field. If the magnitude of the earth’s magnetic field is 0.1 mT and the magnetic field due to the Helmholtz coils is 1.0 mT (perpendicular to the electron beam), the...

Homework Statement Electrons are accelerated from rest through a potential difference of 351 V. Then these electrons enter a uniform magnetic field that is perpendicular to the their initial directon. Due to the interaction with the magnetic field, they move in a circular path of radius...

thank you so much! i had been typing the answer wrong. the computer did not want the answer in scientific notation. so your advice was correct. thank you

that still turned out to be wrong. maybe i am using the wrong formula. this problem deals with a cathode and anode from a helm's coil. any suggestions?

v = (2* 25V * 1.759*10^11 C/kg) ^(1/2) = 2.97*10^6 m/s (VC/kg)^(1/2) = m/s or VC/kg = m^2/s^2 is that true?

reply oh i figured it out. thank you!

Homework Statement Find particular solution for y''+2y'+5y = 4(e^-t)cos2t Homework Equations y.c = C(e^-t)cos2t + C(e^-t)sin2t The Attempt at a Solution y.p (particular solution) = At(e^-t)cos2t + Bt(e^-t)sin2t does not work! Help please!

Homework Statement The original direction of the electron beam as it enters the magnetic field is along the earth’s magnetic field. If the magnitude of the earth’s magnetic field is 0.1 mT and the magnetic field due to the Helmholtz coils is 1.0 mT (perpendicular to the electron beam), the...

Homework Statement Electrons from a heated cathode are accelerated through a potential difference of 25.0 V. Calculate the speed of the electrons escaping through a hole in the anode. Homework Equations v = (2eV/m)^(1/2) The Attempt at a Solution v = (2*25*1.759*10^11)^(1/2) =...

oh okay. thank you so much!