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Physics

Fun facts about Calcium

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Chemistry
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Calcium
http://www.facts-about.org.uk/science-element-calcium.htm Name of Element : Calcium Symbol of Element : Ca Atomic Number of Calcium : 20 Atomic Mass: 40.078 amu Melting Point: 839.0 °C - 1112.15 °K Boiling Point: 1484.0 °C - 1757.15 °K Number of Protons/Electrons in Calcium : 20 Number of Neutrons in Calcium : 20 Crystal Structure: Cubic Density @ 293 K: 1.55 g/cm3 Color of Calcium : silvery Facts about the Definition of the Element Calcium The Element Calcium is defined as...

Radioactive Decay

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Define the following terms: Stable- Not likely to change or fail; firmly established Unstable- Prone to change, fail, or give way; not stable Radioactive Decay- The process in which a radioactive nucleus emits (gives off) radiation and changes to a different isotope or element. A number of different particles can be emitted by decay. The most typical are alpha, beta particles, and gamma rays. Radio Isotope- The process in which a radioactive nucleus emits (gives off) radiation and changes to a different isotope or element. A number of different particles can be emitted by decay. The most typical are alpha, beta particles, and gamma rays. Daughter Element- an element that results from the radioactive decay of another element.

Chapter 13 - Renewable Energy Sources

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Environmental Science
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Projectile Motion

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World Wide Web
Projectile
CNote
Dimensional analysis

What follows is a general solution for the two dimensional motion of an object thrown in a gravitational field. This is usually termed a projectile motion problem. The thrown object is called the projectile. Its path is called the trajectory. We will answer all the usual questions that arise in a first year physics class regarding this motion. We will not consider air resistance. Without air resistance, the projectile will follow a parabolic trajectory. We will be throwing the projectile on level ground on planet Earth. It will leave the point of release, arc through the air along a path shaped like a parabola, and then hit ground a certain distance from where it was thrown.

Alpha and Beta Particles

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Alpha and Beta particles can be both emitted and bombarded with other elements. If a beta particle is a emitted then the original element gains a proton. If a Alpha particle is emitted then the original element looses two protons. And vice versa if the particle is bombared.

Newton Second Law

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Newtons Second Law
Newton was the first to mathematically express the relationship between force and momentum. Some physicists interpret Newton's second law of motion as a definition of force and mass, while others consider it to be a fundamental postulate, a law of nature. Either interpretation has the same mathematical consequences, historically known as "Newton's Second Law": The quantity mv is called the (canonical) momentum. The net force on a particle is thus equal to rate change of momentum of the particle with time. Since the definition of acceleration is a = dv/dt, the second law can be written in the simplified and more familiar form:

Reactions and Enzymes

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Endergonic
Exergonic reaction
Exergonic
Energy
Entropy

Endergonic and exergonic | Back to Top Energy releasing processes, ones that "generate" energy, are termed exergonic reactions. Reactions that require energy to initiate the reaction are known as endergonic reactions. All natural processes tend to proceed in such a direction that the disorder or randomness of the universe increases (the second law of thermodynamics). Time-energy graphs of an exergonic reaction (top) and endergonic reaction (bottom). Images from Purves et al., Life: The Science of Biology, 4th Edition, by Sinauer Associates (www.sinauer.com) and WH Freeman (www.whfreeman.com), used with permission. Oxidation/Reduction | Back to Top

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