Take two identical cans with lids,paint one black and the other white.Fill the same quantity of water in the both cans.Make the hole at the centre of each led and cover the cans with the lids ,Insert a thermometer through the hole in each lids.leave the cans in the sun for an hour or two and note the temperature of the water in each can.
(a) In which can water is hotter and why?
(b) Write any of the changes that heat causes in substances.
Answers
Answer:
a)a the water will be hotter in both the cans but the cans coloured black OK will be more water because black colour is a good absorber and radiator of heat. b) he can make a substance hotter
Water is Hotter in Black painted can compared to white painted can.
Step-by-step explanation:
Taken two identical cans with lids, paint one black and the other white.
Filled both with same quantity of water in both cans.
Made a Hole at the centre of each lid and placed thermometer through hole.
Leave the cans in the sun for 2 hours
Noted down temperature
Observation : Temperature of water in Can painted Black is more than the water in can painted white
Reason : Black absorbs Sunlight
White reflect sun light
As Black absorb all sun light hence temperature is increased more
While white reflect sun light hence temperature increase in less
Water is Hotter in Black painted can
This is also the reason that in summer people prefer wearing white colour shirt and avoid black colour
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