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.
1 You have had mastitis before. 2  You delay or skip breast-feeding or pumping sessions. 3  When you don't empty the breast regularly or completely, your breasts become engorged or too full, which can lead to mastitis. 4  You have cracked or irritated nipples, which can be caused by poor positioning or poor latching on.ou are more likely to get mastitis while breast-feeding if: 1  You have had mastitis before. 2  You delay or skip breast-feeding or pumping sessions. 3  When you don't empty the breast regularly or completely, your breasts become engorged or too full, which can lead to mastitis.