Essays on Annunziata

Question 1: Definition of Environmental Sustainability

The aspect of sustainability entails the ability to carry on a defined practice or behavior for an indefinite period. Sustainability is an emerging concept that is often associated with the environment. According to the United Nations, the sustainability of the environment entails the development that satisfies the requirements of the current population without interfering with the interests of the future generations. Most environmental organizations such as the National Environmental Health Commission (NEHA) and the Environmental Protection Agency (EPA) concur with the definition provided by the United Nations. However, EPA’s definition includes the need to identify the benefits and ...

Question 1:

Ernest Rutherford is sometimes referred to as the “Father of Radioactivity”. Rutherford made many contributions to research into radioactivity and the nature of an atom. Outline his contributions. Rutherford contributed greatly towards the experimenting, studying and understanding of radioactivity, and the atom. His initial contribution was the discovery and definition of the electron. The Nobel laureate proposed the Rutherford atom model that replaced the Thompson model. This provided an excellent basis for future work into the studying of atoms, as well as, their physical and chemical properties. He was involved in research aimed at splitting the atom leading to ...

Question 1

Radioactivity is the process by which unstable isotopes of elements disintegrate in the nucleus to release energy in form of gamma rays, beta radiation and alpha radiation. The disintegration occurs as a result of the stability within the cell nucleus. Some isotopes of elements have non-balancing number of the protons as compared to the neutrons, as a result of the lack of balance between the negative and the positive charges in the nucleus; the nucleus becomes unstable and disintegrates. Radioactive radiation was first discovered by Henri Becquerel in 1896 as he was working on X-ray. By then the X-ray ...

Question 1

Ernest Rutherford One of the contributions of Ernest Rutherford includes the discovery that the Becquerel rays consisted of two different rays (Sears, 2015). The discovery of the two rays came about after Ernest Rutherford focused his attention on actual radiations that are emitted by radioactive substances. The experiment consisted of evaluations of radiations that were emitted from successively layered sheets of aluminum placed over a uranium compound. A distinction made in the two forms of rays was their penetrating power. According to Sears (2015), to be able to distinguish between the two forms of rays, Rutherford named the easily ...