The faster a sound wave travels, the more distance it will cover in the same period of time. If a sound wave were observed to travel a distance of 700 meters in 2 seconds, then the speed of the wave would be 350 m/s. A slower wave would cover less distance-perhaps 660 meters-in the same time period of 2 seconds and thus have a speed of 330 m/s.
Melanoma Definition. Melanoma is a form of skin cancer that arises from melanocytes-the cells that produce pigment. Melanoma may begin in association with a mole. Melanocytes produce a pigment called melanin that gives the skin its colour and protects it from sun damage.
A-Malignant melanoma, commonly called melanoma, is cancer of the melanocyte cells of the skin. It is an aggressive cancer that requires aggressive therapy to control its spread. Basal cell carcinoma, also known as basal cell epithelioma, is the most common form of skin cancer. It is a slow-growing cancer and seldom metastasizes, but it can grow so large that the entire area of the nose, the lip, or the ear must be removed and reconstructed.