Recent content by David23454

Thanks!

Homework Statement Rewrite following sequence as double stranded molecule, with an inversion of the sequence between nucleotide 4 and 12. 5'-TCTCGCATGGTAGGT-3' Homework Equations none. The Attempt at a Solution [/B] I've read in the textbook that you take the section and rotate it 180...

Using geometry, I think the radius of the should be (Δx2+Δy2)/2Δy, which should be 0.05476 m. Then I should be able to put it in the formula B=mv/rq. Does this sound correct?

The x-component of the position should be the length of box containing the magnetic field (xf-xi)=0.024 m, and the y-component of the position should be y=(0.024)tan(13).

x(t)=vx+0.5axt2 and y(t)=vyt+0.5ayt2 I know that I have to incorporate something relating to the fact that at t=0 where position is (0, mv/qB) and velocity is (v,0), but I'm not sure how to proceed.

ok

Wait, I think I might be getting it, so the equation would look like : since ac=v2/(mv/qB) then B=m((v2)/(mv/qB))/qv

Ye Yes, r=mv/qB, but since the magnetic field is what I'm trying to find, I'm not sure what I can do with it.

Oh, I think I see. So, the acceleration I should use to input into the equation B=ma/qv should be: ac=V2/r How would I calculate the "r" in the equation for centripetal acceleration?

Right. I'm pretty sure I used π/2=90 degrees in my calculations. I'm trying to find the field strength needed to deflect the electron. Any idea where I went wrong in my calculations?

Homework Statement An electron in a cathode-ray tube is accelerated through a potential difference of 10 kV, then passes through the d = 2.4-cm-wide region of uniform magnetic field in the figure(Figure 1) . What field strength will deflect the electron by θ = 13 degrees?Homework Equations...

does it have something to do with the electric field of a sphere E=Q/4πε0?

Homework Statement Two 3.0-cm-diameter aluminum electrodes are spaced 0.50 mm apart. The electrodes are connected to a 200 V battery. Find the capacitance of one of the spheres. Homework Equations [/B] C=QV C=ε0A/d The Attempt at a Solution [/B] I'm really not sure how to approach this...

Homework Statement In a certain region, the electric potential due to a charge distribution is given by the equation V (x, y, z) = (3x2y2+yz3-2z3x)V0/a4 where a, x, y, and z are measured in meters and V and V0 are in volts. What is the magnitude of the electric field at the position (x, y, z)...

yes