Your My Hy-Vee account provides access to your history, allows you to print records, submit multiple prescriptions at once and more. Learn more. This healthy lifestyle program emphasizes eating for good health, weight loss and being physically active. Beginâ¢ is not a âdietâ- Beginâ¢ is a plan to help with lifelong wellness.
Given sufficient temperature and pressure, 4 hydrogen nuclei fuse to produce helium, at the same time giving off energy in the form of heat and light and other forms of radiation. This means that stars, with a few exceptions such as super-massive stars, last for many billions of years.
Low mass stars, such as our Sun, use the proton-proton reaction to generate almost all of their energy. More massive stars can use more efficient reactions (which you learn about in the next unit). Regardless of reaction used, however, the net result is always the conversion of 4 hydrogen atoms into a helium atom. This turns out to be the most basic defining process for stars. Where have all the neutrinos gone?