This question is probably best asked of the manufacturer who may have this information in their test data. Why not just use as directed?
the gas stays on but the water still doesn't get hot
Because hot water kills some of the bacterias that you will have on your skin or in your hair.
Yes, your gas water heater will still distribute hot water.
Hot water can be effective in killing weeds by damaging their cell structure, but it may not completely eradicate them. It is a non-toxic and environmentally friendly method of weed control.
cheaper in cold water as you don't have to heat up the water. but it is definitely not as effective
By hiring a plumber...
Water can dissolve some susceptible minerals. Very hot water,particularlyunder pressure, can dissolve many minerals. Acidic hot water would especially be effective in mineral dissolution. Very pure hot acidic fluids would be most effective in mineral dissolution.
Never
Using Clorox bleach with hot water can enhance its cleaning effectiveness. Hot water can help to activate and accelerate the action of the bleach, making it more effective at disinfecting and removing stains. However, be sure to follow the instructions on the Clorox bleach bottle for the correct dilution ratio and contact time for optimal results.
polystyrene
I recomend hot water as gasoline is still an oil product and will be greasy
That is not a safe or effective method of preventing pregnancy.