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.
Causes of blisters. Blisters are most often caused by skin being damaged by friction or heat. Certain medical conditions also cause blisters to appear. The damaged upper layer of skin (epidermis) tears away from the layers beneath and fluid (serum) collects in the space to create a blister. Friction.