Quick answer: So the LEGO models move and can be interacted with. Otherwise it would be a boring model.
DC series motors run on DC power. Homes have AC power, not DC power. You could use DC motors in homes if you have a power supply or use a battery, but it is usually more cost effective to use an AC motor.
Well that depends on the type of motor. DC motors use direct current DC and induction motors use alternation current AC.
Becoz it use frequecy to start
Basically anything that works with batteries usually works with DC motors, i.g. your hard drive, your cellphone vibrator, toys, etc. Also, even for large motors, the DC motor has the advantage of being easily controlled by input voltage. Induction motors, on the other hand, can use controlled input voltage but they will have to deal wth low torque when the voltage is low. DC motors are used for those little fans in your computer. Also, CD players also use DC motors to spin the discs. DC motors are important where absolute speed control and feedback are necessary. For your household appliances, including fan motors, those are AC motors, cheaper for the industrial strength and more efficient.
The difference between crown motors and regular motors is that crown motors is a company, and regular motors are not. Regular motors, are the motors that can be found under a car hood.
any garage
If you want it to do what you want it to do yes but I'd you don't use motors it easier but if you do it's a little more expensive
to cool down the engine
You use your Lego ID and password.
lego factory
youll need motors, axles and some differentials. simpley hook up the motors, dont change any gear ratios. use differentials to transfer the power to the propellor, make a propellor ans stick it on the end. make a top bit to make it look nice :)
The Lego Batcave was released in 2002. It has 20000 individual pieces and weighs 100 pounds. It also has its own lighting system and several motors to run things like elevators.
read the Lego club magozine
you can't. you can use the electronic buzzer though
Lego tried to because Mega Bloks used 'studs' and Lego said that they are only allowed to use them but Lego failed to sue them.
it takes 31 bricks
it is use to, break motors