Under what circumstances the resultant temperature will be the average temperature when two substances are mixed together?
When two liquids at different temperatures are mixed and the resultant temperature is found to be the mean of their temperatures then their densities must be equal.
When two samples at different temperatures are mixed the temperature of mixture can be?
Do hotter objects lose heat faster?
A will lose heat faster. Conduction and convection scale as the temperature difference, which is almost twice as large for A as for B. The warmer water in A will also evaporate faster, removing more heat as it does. A hot cup of coffee left in a cool room will cool down because the room is colder than the coffee.
Does heat transfer faster than cold?
These atoms and molecules are always in motion. If they have the same mass, hot atoms and molecules move, on average, faster than cold ones.
Why does heat flow as temperature decreases with temperature?
The atoms of the system with higher temperature will gain the heat energy and the vibration of these atoms will increase. The atoms or molecules on the system with lower temperature have lower temperature and are not vibrating. So, we can say that heat always flows from higher temperature to a lower temperature.
Why are heat sources at high temperatures more useful than those at low temperatures?
The atoms and the molecules are more energetic at high temperatures than at the low temperatures. An increase in the temperature results in release of more heat and this causes more work done on the other hand the heat source at low temperature gets cooled quickly.
Which material conducted heat better when he put the butter on the knife?
The butter on the metal spoon almost immediately melted away; the butter on the wooden spoon melted some; meanwhile, the butter on the plastic spoon stayed firm much longer. The heat was transferred by moving molecules within the spoons. Metal conducts heat much better than plastic or wood.