No. All polarised means is you must connect the capacitor the right way round in the circuit, non-polarised capacitors can be connected either way round.
if u connect all the ground symbols the the negative supply. couldnt you then just run one main wire from the negative to a ground in order to ground them all?
if u connect all the ground symbols the the negative supply. couldnt you then just run one main wire from the negative to a ground in order to ground them all?
I'm not sure if you think you need an earth ground. You don't. The ground symbol is just a way of indicating the common node in the circuit. You just need to connect all of them together with a plane or with heavy bus wire (as short as possible), and connect the negative terminal of the battery to that same node.
If you want but you don't really need to. Ground is just a referance point in a circuit, it's considered to be 0V, if you like you can take the poisitive end of the battery to be 0V then all voltages would be have negitive values. In practice, this makes no difference, like I say this context the word ground or earth is purely theoretical.
if u connect all the ground symbols the the negative supply. couldnt you then just run one main wire from the negative to a ground in order to ground them all?
Less than half a watt into his dinky little speaker won't be any louder than his actual voice in a room. If he used a horn type of speaker as is used in a real megaphone then it will be loud enough to deafen someone in the same room.