An ice cube is floating in water kept in glass. The water in glass will get cooled majorly by:
Correct answer: A. Convection
- A. Convection
- B. Conduction
- C. Radiation
- D. Conduction and convection both
Explanation
The correct answer is convection. In this scenario, the heat from the warmer water is transferred to the ice cube primarily through convection currents. As the ice melts, the cooler water mixes with the warmer water, creating a convection cycle that gradually cools the entire glass of water. Conduction is not the main process because it typically involves heat transfer through solids. Radiation is irrelevant in this scenario as it involves heat transfer through electromagnetic waves, which does not apply here. Therefore, the cooling effect is primarily due to convection currents in the water.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
Practise Thermodynamics
714 free Thermodynamics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Thermal Equilibrium and Heat questions
Mechanism of heat-transfer involved in freezing of lakes in colder region:
Which of the following is equivalent to a temperature 350K?
Which of the following changes when taken together, will result in decrease in the pressure of an ideal gas?
Robin wanted to shove a rubber pipe up a plastic tap. The problem is that the pipe's diameter is smaller than that required to secure a tight fit. So, Robin switched on a hair dryer and pointed it towards the pipe. He found that now the pipe fitted in easily. Why is this so?
If two rods of length L and 2L having coefficient of linear expansion α and 2α respectively are connected so that total length becomes 3L, the average coefficient of linear expansion of the composition rods equals :
Some water at 0°C is placed in a large insulated enclosure (vessel). The water vapour formed is pumped out continuously. What fraction of the water will ultimately freeze, if the latent heat vaporization is seven times the latent heat of fusion?