A conducting wire is carrying current directly up in external magnetic field perpendicular to wire. What direction of magnetic field allows this wire to levitate

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

3. dark matter

empty space could also be a simple vacuum