There is 1 ohm in 1 volt.
None. Watts and volts measure different things.
1000 ohms.
That is 366,300 ohms.
3500 Ohms
1000 Ohms = 1 kilo (not killow) Ohms
1.2
2561 ohms.
863,000 ohms.
4 ohms
There is no single standard. Many computer speakers are rated at 8 ohms while others are 16 ohms or higher. My computer subwoofer here is 4 ohms.
Since "milli" means "thousandth", there are 150 milliohms in 0.15 ohms.
2,561 ohms.. K means X1000