Two daily uses of the principle that black objects absorb more heat than white or polished ones:

1. Solar Water Heaters:
Solar water heaters use the principle that black objects absorb more heat to efficiently heat water using sunlight. The water in the solar collector is contained in black tubes or plates, which absorb the heat from the sun's rays. This absorbed heat is then transferred to the water flowing through the tubes, heating it up for domestic use. The black color of the tubes helps maximize the absorption of sunlight and increase the efficiency of the solar water heater system.

2. Solar Cookers:
Solar cookers also utilize the principle that black objects absorb more heat than white or polished ones. The cooking pots used in solar cookers are typically painted black to maximize heat absorption. When exposed to sunlight, the black pots absorb heat and transfer it to the food inside, allowing for cooking without the need for electricity or gas. Solar cookers are eco-friendly alternatives to traditional cooking methods and are especially useful in areas where access to conventional fuel sources is limited.
By harnessing the heat-absorbing properties of black objects, these daily applications demonstrate how this principle can be utilized in practical and sustainable ways.