Recent content by sweetipie2216

What is the minimum potential difference applied to an x-ray tube if x-rays of wavelength 0.250 nm are produced? E=hf f=c/wavelength f=3e8/.250e-9 =1.2e18 then i applied it to the first equation using Plancks constant as h and my final answer came out to be 7.95e-16 KV...

i got the answer, thanks for trying to help

Homework Statement An electromagnetic rail gun can fire a projectile using a magnetic field and an electric current. Consider two parallel conducting rails, separated by 0.530 m, which run north and south. A 49.0 g conducting rod is placed across the tracks and a battery is connected between...

never mind i figured out the answer. thanks for your help

my direction is north

Homework Statement A magnet produces a 0.90 T field between its poles, directed to the east. A dust particle with charge q = -1.0 10-18 C is moving straight down at 0.70 cm/s in this field. What is the magnitude and direction of the magnetic force on the dust particle? Homework Equations...

so far for one of my answers i got I2=-.0893 i just checked and webassign said it's wrong. What am i doing wrong so that it is coming out wrong. help a bit more its due in about an hour and half.

so would the equation instead be 22I1+56(I1+I2)+5=0 instead of 22I1+56(I1+I2)-5=0

Homework Statement Find the magnitude of the current in each branch of the circuit shown below, in which B1 = 1.96 V. Specify the direction of each current. diagram: http://img183.imageshack.us/img183/6951/physics.gif Homework Equations I1+I2-I3=0 I1+I2=I3 The Attempt at a...