Can you connect your PC to a TV?
Yes, it is certainly possible to connect your computer to the tv but you must have a video card with tv out.
Can you connect your headphones to your xbox and your guitar amp at the same time?
The manual for the LG800G shows describes a "handsfree or stereo earphone connector." It requires a (larger than some) 3.5mm male plug.
If you connect your 30GB ipod video to your firewire adapter and wall charger 5DC volts 0.67A will it do nothing charge your iPod or ruin your ipod?
A firewire connection wil charge your video iPod perfectly.
Can you connect your internet from your iPhone to your lap top?
no there is no any way to make n72 3g. I have already a n72.
Can you connect your component cable with your t.v which has a composite input?
and my composite cable is a phono cable n the cable is for my ps3