Pickett's Charge

The Atomic Theory states that all matter is composed of discrete units called atoms. The Atomic Theory started in about 400 BCE with a scientist by the name of Democritus. Democritus proposed the idea of the existence of an ultimate particle. He called this particle atomos when he was describing it, because the particle was too small to cut. Next, we get to Leucippus. Leucippus was the man who founded atomism, which is a theoretical approach that states nature consists of two principles, which…

to prevent degradation of pancreas by elevated trypsin activity. Figure 1: Structure of Trypsin-1. Retrieved from the Protein Data Bank. Figure 1: Structure of the catalytic triad. Residues D63, H107 and S200 as shown. Arrows represent the flow of charge that increases the serine’s nucleophile behaviour. James Gatenby SID:310255511 2. Examination of Sequence…

the nucleus disproved the plum pudding model and gave way to the nuclear model. Then, Niels Bohr, student of Ernst Rutherford, would then help explain the characteristics of elements and atoms by the discovery of valance electrons and the levels of charge. Even though Bohr does not have the right model, it is still used today to help teach the valance electrons. The correct representation of the atom, the cloud model, is an extreme explanation to the question of what makes up the…

were black marks on the sides of the foil that suggested that it reflected off of the gold foil along with appearing on the other side. With this experiment disproving J.J.’s model, Ernest proposed his own idea. His idea was that all of the positive charge and all of the mass of the atom occupies a rather small volume at the direct center of the atom. Also the most volume of the atom was from the empty spaces that electrons were found in. Another person who takes place in changing the history of…

through many different contradicting testimonies. Subsequently, scientists have created many theories for the origin of the lights, involving numerous examples from piezoelectricity which is the he ability of certain materials to generate an electric charge in response to applied mechanical stress. (Reed…

Atoms are very,very small. They couldn’t have been seen until 1981 with the invention of scanning tunneling microscopes. But the ideas go all the way back to ancient Greece. The beginning of the atom start around 450 B.C. with a Greek philosopher named Democritus. Democritus and a younger contemporary of Socrates. He was born in Abdera in 460 B.C. His teacher was Leucippus. Democritus was known as the laughing philosopher because he really understood cheerfulness. He stated that all things were…

They have a negative charge of -1 , and there so light that their weight is usually ignored .atoms are electrically neutral , this is due to the fact that the number of protons are the exactly the same as the number of electrons .electron are organised around the nucleus…

Field strength or intensity is the force which maintains the magnetic flux and produces a particular value of the flux density B at that point in a magnetic field. Therefore the flux density is the cause while the flux density (B) is the effect. The flux density can be assumed proportionally to the field intensity in a magnetic field which comes in three parts. First part is: Where U stands for the permeability of force (the measure of the degree to which the magnetic line of force can…

attributed this phenomenon to a theory termed “action at a distance” which presumes that since insulators block electric current, the only reason why a charge is found on the outer surface is that electricity can work at a distance, the way gravity does. They explained that when electricity was accumulating on the inner surface, an electricity of the opposite charge was attracted to the outer surface. Therefore, when the scientist touched the outer surface, he received an electric shock. (The…

The SEM produces a largely magnified image by using electrons instead of light to form an image. A beam of electrons is produced at the top of the microscope by an electron gun. It consists of an electron gun to produce high energy electron beam. A magnetic condensing lens is used to condense the electron beam and a scanning coil is arranged in-between magnetic condensing lens and the sample. The electron detector (Scintillator) is used to collect the secondary electrons and can be converted…