Question

type your response in the box.
equipment required: two empty coffee cans (3-pound size), a thermometer, a can of flat black spray paint, and some tap water. one of the coffee cans needs to have a shiny metallic surface on both sides. spray the other can with the flat black paint, on both sides.
fill the two cans with about two inches of tap water. using a thermometer, measure the temperature of the water in each can (the readings should be the same). remove the thermometer and place the cans in a sunny location where they will not be disturbed and will receive two hours of sunlight. after two hours, again measure the temperature of the water in each can. note down your observations and conclusion.

Explanation:

1. Observation: After two hours in sunlight, the water in the flat black painted coffee can will have a significantly higher temperature reading than the water in the shiny metallic can. Black surfaces are excellent absorbers of solar radiation, converting more sunlight into thermal energy to heat the water, while the shiny metallic surface reflects most incoming solar radiation, absorbing very little energy to warm the water.
2. Conclusion: Dark, matte surfaces absorb more solar radiant energy than light, shiny reflective surfaces, leading to greater temperature increases when exposed to direct sunlight.

Answer:

1. Observation: The black painted can's water will be hotter than the shiny can's water.
2. Conclusion: Dark matte surfaces absorb more solar energy than shiny reflective surfaces.