a. they have moving charges. b. they have magnetic domains. c. they have magnetic domains that align.d. they contain iron.
year make model engine//trans//the newer cars need cats and they dont restrict flow/they work to cut down pollution
depends where u live.if your area does emission teststhen the engine may need it .may throw an O2 engine codewhat they do is they help burn any unburned fuel vapors.
Depends on how complex the class is. Iron, cobalt, and nickle are magnetic, where copper is not, but electric motors are electricity flowing through copper wire wrapped around iron blocks. So, I'd guess D, When they contain Iron, but the answer may be more complex.
