If a wire lies within a magnet field and an electric current is produced in the wire, what must be true about the magnetic field? A. the magnetic field must be produced by an electromagnet

B. the magnetic field must be produced by permanent magnets

C. the magnetic field cannot be moving

D. the magnetic field has to be moving

attach the statements so i can answer : )

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

e/c, where e is its total energy

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form