Cold water is better for the enviorment, because it uses "NO" electricity and power.
Depends. It is best for the environment / energy savings to always wash in cold water. If clothes are stained, the best water temperature might depend on what kind of stain.
Dishwasher should only connect to the hot water line. Here is no additional heater for the water so tt should be the same temperature of the water boiler of the house.
For hand washing, the water should be between 100 and 110 degrees Fahrenheidt - noticeably hot but not scalding.
the environment
IT is about 90 Fahrenheit/ 32 Celsius
The temperature is very important because all clothes and textiles are different. They all have their own strength and weaknesses. Some wash better in hot water, some in cool.
105 DEG give or take 50 Deg
the sensors are usually temperature, speed of drum and water level
Raising the temperature of a solvent, like water, increases the solvent's capacity to dissolve a solute, like washing powder.
Rainwater is usually the same temperature as the surrounding atmosphere.
air, water, soil, and temperature air, water, soil, and temperature
This is more a matter of colour and material. Look for a label with washing instructions.