Modern shower heads are mandated to allow 2.5 gallons per minute through them. If it is an older shower head that could be up to 8 or 9 gpm.
An easy test is get a five gallon bucket and let the shower run into it for a timed minute. You can measure up the side and see if fills about 1/2 of the bucket or not.
6.3 gallons of water us used
Approx. 15 to 20 litres are used in a single shower
It would depend on the shower speed setting
In an average bath 90L of water but if you like it really full it will be more than 100L of water so in stead of having a bath have a shower because it is quicker -unless you like to stand there and enjoy the water all over you're hair -have a shower because it saves about 60L of water
6.3 gallons of water us used
This is impossible to say as all showers are different.
On average about 20L of water is used when cooking.
Yes, yes they do reduce water consumption. Also, much like a filter for your tap water, it will help to offer cleaner water in the shower for both your water and hair.
Easy to figure out 2.2 * 8 = 17.6
Can't say because this depends on the flow coming out of the shower head. If the flow is 1ltr per minute then in 10 minutes you will use 10 litres The average shower in the US flows at a rate of 7.9 liters per minute, or 2.1 gallons per minute. A ten minute shower would consume 79 liters or 21 gallons of water.
We can't provide graphs on WikiAnswers. However, here is an answer to a similar question: It depends on your shower head and whether it has a flow restrictor in it and how long you shower. If your home was built before 1992, chances are your showerheads put out about five gallons of water per minute (gpm). Multiply this by the number of minutes you're in the shower, and the water adds up fast! An average bath requires 30-50 gallons of water. The average shower of four minutes with an old shower head uses 20 gallons of water. With a low-flow shower head, only 10 gallons of water is used. To test the amount of water used in a shower vs. a bath is to put the plug in the bath next time you take a shower (but not a stand-alone shower as you might spill over the lower shower wall). After you've showered, see how much the tub filled up. If there is less water than you would usually have in a bath, then you will probably save money by taking a shower instead of a bath.
electrical energy forces the water out.