you feel hot because, when you stand near a fire the temperature around you is gretter than your body temperature leading to an exchange of heat, your body then gain heat from the fire . THIS IS BECAUSE OF THE PROCESS OF RADIATION. THE HEAT CAN BE ABSORBED BY OUR BODY WITHOUT ANY MEDIUM.
Q. What are the 2 conditions necessary for the conduction of heat?
(i) The two objects should be in direct contact with each other. (ii) The temperature of the two objects should be different. Heat will flow from a hotter object to a cooler object.
Table of Contents
- Q. What are the 2 conditions necessary for the conduction of heat?
- Q. What phenomena describe when a huge rock at the state park gets so hot during the day that you can’t sit on it?
- Q. What happens to the particles when you mix hot and cold water?
- Q. What happens when something cold touches something hot?
- Q. How does energy transfer flow when a cold substance is mixed with a hot substance?
- Q. Is mixing hot and cold water bad for health?
- Q. What happened to some of the heat from the hot water when transferred to cold water?
- Q. How do you find the temperature of mixing two liquids?
- Q. Which of the following planets have conditions that can support life?
Q. What phenomena describe when a huge rock at the state park gets so hot during the day that you can’t sit on it?
Heat Transfer
| A | B |
|---|---|
| A huge rock at the state park gets so hot during the day that you can’t sit on it from_______________ | Radiation |
| fireman feels a door and it is hot from the fire on the other side due to _______________ | Conduction |
Q. What happens to the particles when you mix hot and cold water?
When you heat up water, the water molecules start moving around faster and faster. They bounce off each other and move farther apart. 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.
Q. What happens when something cold touches something hot?
When a warm object comes into contact with a cold object, the faster-moving particles of the warm object bump into the slower- moving particles of the cold object. As a result, energy is transferred. This causes particles of the cold object to speed up and the particles of the warm object to slow down.
Q. How does energy transfer flow when a cold substance is mixed with a hot substance?
Energy always moves from higher energy (hot) to lower energy (cold).
Q. Is mixing hot and cold water bad for health?
Research suggests that the temperature of the water that people drink can affect levels of sweating and rehydration. For example, a United States Army study from 1989 found that drinking warm water (40°C) rather than cool water (15°C) may cause people to drink less, which can lead to dehydration.
Q. What happened to some of the heat from the hot water when transferred to cold water?
There is nothing physical or material moving from the hot water to the cold water; only energy is transferred from the hot water to the cold water. Other than the loss of energy, there is nothing else escaping from the hot water and other than a gain of energy, there is nothing entering the cold water.
Q. How do you find the temperature of mixing two liquids?
Calculate the final temperature of the water mixture using the equation T(final) = (m1_T1 + m2_T2) / (m1 + m2), where m1 and m2 are the weights of the water in the first and second containers, T1 is the temperature of the water in the first container and T2 is the temperature of the water in the second container.
Q. Which of the following planets have conditions that can support life?
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.
