What happens to the temperature of warm and cold water when left at room temperature?

What happens to the temperature of warm and cold water when left at room temperature?

Since cold water is more dense, it sinks in the room temperature water. When water is heated, the water molecules move faster and spread out more. This makes hot water less dense than room temperature water. Since hot water is less dense, it floats on the room temperature water.

Why should you wait for temperature to stabilize before taking a reading?

Once equilibrium is reached, a final temperature reading can be taken. Returning to our initial question, you have to wait to see your temperature because you have to keep that thermometer under your tongue until equilibrium is reached and you get an accurate reading.

What happens when mixing hot and cold water?

So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way and creating purple water.

Why are my thermometers reading different?

Differences between measurements can also result from the following factors: The thermometer is not the same temperature as the room you are measuring in (Example: it has been in a much warmer or colder room). The thermometer is inserted into the ear canal at a different depth or angle.

Why does a nurse taking your temperature wait for the mercury thread in the thermometer to stop varying before taking the reading?

When the clinical thermometer is taken out of the mouth,the temperature neither rises nor fall because there is a kink in it which helps to avoid the back flow of mercury.

What causes the difference in the hotness or coldness?

Hotness is due to the high temperature and hence high kinetic energy of molecules in it. And Coldness is due to the very low temperature and hence very low or negligible kinetic energy of molecules in it.

Does the calorimeter absorb heat from cold water?

If the calorimeter absorbs no heat at all, the equilibrium temperature of the mixture is the average of the hot and cold temperatures. In reality, the hot water loses heat to both the cold water and the calorimeter. In other words, heat gained by the cold water should equal that lost by the hot water.

What is the difference between heat gained and lost by cold water?

In other words, heat gained by the cold water should equal that lost by the hot water. Any difference is due to heat gained by the calorimeter. This assumes no heat is lost to the surroundings from the calorimeter. Heat lost by hot water = heat gained by cold water + heat gained by calorimeter.

How does temperature affect dissolved oxygen in a river?

Water temperture affects dissolved-oxygen concentrations in a river or water body. As the chart shows, the concentration of dissolved oxygen in surface water is affected by temperature and has both a seasonal and a daily cycle. Cold water can hold more dissolved oxygen than warm water.

What is the temperature reading on a thermometer if the thread crosses?

Then the number of the division the mercury thread has crossed is noted (3 in this case). Now, this value is multiplied by the value of one division (which is 0.2 in this case). Hence, the temperature reading is 98 + (3×2) = 98.6. Stay tuned with BYJU’S to learn more about heat energy, thermometer and many more.