1)A flat piece of aluminum foil is placed on the surface of a pan of waterAlthough the aluminum is more dense than water, the foil does not sinkWhy?2) It's a very hot day at the beachThe air temperature is greater than 32 degrees Celsius and there's no breeze to cool you offWhy do you feel cooler when you get out of the water?Please give detailed answers and explanations because I don't understand these questions
I think this is how you do it: You also need the width of the foil, I am assuming it is 12 wide, if it is a different width, just plug in the new number and re-calculateThe dimensions of the foil x the density should give the weight, we know 2 of the 3 dimensions, the density and the weight, so: 30.48 cm x 75 x 30.48cm x X cm x 2.70g/cm^3 12 oz x 28.4 g/oz Isolating the X value on one side we get: 340.8g/(30.48 cm x 2286 cm x 2.70g/cm^3) X cm X cm 0.0018cm x 10mm/cm 0.018 mm
1) The surface tension will cause the Aluminum to float: Ref: hyperphysics.phy-astr.gsu.edu/hba2) Water is being evaporated - you are feeling the heat leave the surface of your body
