2007-04-26 11:06:24 · 8 answers · asked by You Know Who 1 in Science & Mathematics ➔ Biology
Both warm (not hot) and cold sensations are captured by the free nerve endings that reside near the surface of your skin.
The reason I wrote warm is because basically hot sensation on the skin is due to pain receptors which are located deeper than the warm-cold receptors. The pain receptors are usually activated above 45 degrees celcius( or approximately there).
So, the reason why you feel cold at the beginning then hot is because the location of the nerve endings. since cold nerve endings are closer to the surface of the skin, then you feel that the hot water is cold but overtime, as the stimuli reaches your pain receptors, you feel hot.
I hope my explanation is clear enough for you to understand.
2007-04-26 19:33:51 · answer #1 · answered by E_C_guy 1 · 0⤊ 0⤋
Do you mean the way the hot water feels when it comes from the faucet?
At first you are feeling the temperature of the water that was already in the pipes between you and the water heater. It has been sitting in the pipes and getting cooled off ever since the last person ran the hot water from that faucet.
Once that water has run out, you start to get the hot water from the water heater.
2007-04-26 18:09:37 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋
Hot water is in the hot water heater. The water in the pipes to your faucet are metal and cool. It takes time for the hot water from the tank to push the cooler water out of the way to get to where your faucet is.
2007-04-26 18:15:37 · answer #3 · answered by Anonymous · 0⤊ 0⤋
It's because the sensory receptors in your skin can detect hot, cold, and warm temperatures. The receptors for hot and cold are the same so sometimes, you can feel cold at first when the thing your touching is really hot and vice versa. Soon, you will tell what the temperature really is and react to it. :-)
2007-04-26 18:29:55 · answer #4 · answered by Anonymous · 0⤊ 0⤋
because it if it sits in the pipes for a certain amount of time. the water cools down then when you run the water the hot water has to travel though the pipes which then pushes the cooled water out first.
2007-04-26 18:10:24 · answer #5 · answered by kelly 4 · 0⤊ 0⤋
its because the water in the pipes have cooled and the water coming out of the water heater or boiler is hot and has reached the faucet.
2007-04-26 18:09:55 · answer #6 · answered by . 5 · 0⤊ 0⤋
Because your water heater has to warm it up first.
2007-04-26 18:08:28 · answer #7 · answered by primalterozi 3 · 0⤊ 1⤋
That's the time it takes for the heat to be felt by your nerves.
2007-04-26 18:09:41 · answer #8 · answered by Anonymous · 0⤊ 1⤋