There are two basic types of wave motion for mechanical waves: longitudinal waves and transverse waves. The animations below demonstrate both types of wave and illustrate the difference between the motion of the wave and the motion of the particles in the medium through which the wave is travelling.
Updated:Sep 16,2015. Heart disease is the No. 1 killer for all Americans, and stroke is also a leading cause of death. As frightening as those statistics are the risks of getting those diseases are even higher for African-Americans. The good news is, African-Americans can improve their odds of preventing and beating these diseases by understanding the risks and taking simple steps to address them.
This publication provides the estimated numbers of new cancer cases and deaths for African Americans, as well as the most recent statistics on cancer occurrence and information on cancer risk factors (e.g., tobacco use, obesity, and physical inactivity) and the use of cancer screening tests.his publication provides statistics about the occurrence of breast cancer, as well as information about risk factors, prevention, early detection, and treatment. 1  Current Breast Cancer Facts & Figures (PDF). 2  All Breast Cancer Facts & Figures. 3  VIDEO: Breast Cancer Facts & Figures 2013-2014 Key Findings.