If this is a sound wave, the denser the medium, the faster the wave. For a light wave, the denser the medium, the slower the wave. It all depends on the medium through which it travels. The factor of the medium that plays a role on the velocity of a wave is its density. If this is a sound wave, the denser the medium, the faster the wave.
Mastitis is an infection of the tissue of the breast that occurs most frequently during the time of breastfeeding. This infection causes pain, swelling, redness, and increased temperature of the breast. It can occur when bacteria, often from the infant's mouth, enter a milk duct through a crack in the nipple. This causes an infection and painful inflammation of the breast.
Mastitis is a breast inflammation usually caused by infection. It can happen to any woman, although mastitis is most common during the first 6 months of breast-feeding. It can leave a new mother feeling very tired and run-down. Add the illness to the demands of taking care of a newborn, and many women quit breast-feeding altogether. But you can continue to nurse your baby. In fact, breast-feeding usually helps to clear up infection, and nursing will not harm your baby. Although mastitis can be discouraging and painful, it is usually easily cleared up with medicine. Mastitis most often happens when bacteria enter the breast through the nipple.