why is running water alwayz colder than standing water?i know?

Answer 1

It's not. But moving water will cool a hot object more rapidly than standing water due to an increased coefficient of convection, so it will feel colder on the skin (assuming the water is below body temperature). This is the same reason why cold air feels colder when it is windy, even though the air itself remains at the same temperature.

Answer 2

running water is always colder than standing water because standing water is not moving. since it is sitting there it is heated by the sun all at once. but moving water isn't sitting still so the sun cannot warm it.

Answer 3

because as the water moves along heat is allowed to escape from the surface via convection as well as radiation (all objects above the temperature of -273 degrees centigrade / 0 degrees kelvin / absolute zero give off heat in the form of radiation) and the exposed surface is constantly refreshed so heat has the chance to escape from inner molecules within the liquid. the surface of the liquid that comes into contact with te interface over which it flows is also constantly refreshed and loses heat via conduction.
If the liquid is allowed stand still, heat can only escape from the static surface via radiation as well as to the soild interface that it comes into contact with via conduction. heat will have to travel via conduction within the water molecules situated within the liquid constantly evening out the temperature accross the liquid which will take longer than if the surfce over which heat loss occureed was constantly refreshed allowing heat to be able to leave from within inner layers of the liquid.
NOTE: THIS WILL ONLY HAPPEN PROVIDED THAT THE SURROUNDING ENVIRONMENT IS OF A LOWER TEMPERATURE THAN THE WATER AS HEAT TRAVELS FROM PLACES OF HIGHER TEMPERATURE TO PLACES OF LOWER TEMPERATURE UNTIL THE TEMPERATURE IS EVENED OUT ACCROSS THE WHOLE MASS.

Answer 4

Hi. It just feels that way. If the temperature is the same, it's the same wether or not the water is moving or not.