For example, in the fraction 3/4, the numerator, 3, tells us that the fraction represents 3 equal parts, and the denominator, 4, tells us that 4 parts make up a whole. The picture to the right illustrates 3 4 {\displaystyle {\tfrac {3}{4}}} or Â¾ of a cake.
The Causes of Sunburn Blisters. Sunburn blisters are a result of overexposure to the UVA and UVB rays in the sun. â¢ UVA. These harmful rays penetrate deep into the bottom skin layers and damage the production of new skin cells. High doses of UVA rays will cause sunburn blisters.
Friction or rubbing of the skin is one of the most common causes of blisters. Blisters caused by rubbing and friction can occur after walking, running or hiking long distances, especially while wearing ill-fitting shoes, or after performing other repetitive motions over an extended period of time; for example, shoveling dirt in the garden.