In Newton's time the atom was thought to be a small hard indestructible sphere, this was a good model for the kinetic theory of gasses, but new models had to be developed in order to explain the electric nature of atoms.
Ernest Rutherford and a couple of his students in 1911 performed an experiment where they shot positively charged alpha particles at a piece of foil and interesting enough the most of the alpha particles passed right through the foil and some bounced back.
This lead Rutherford to conclude his planetary model, although a good model but it does have a couple problems.
Ch28.2 If a gas is put into an empty tube at very low pressure and a voltage is applied between two metal electrodes that cause a current to flow through the gas a light will be emitted which is unique to the gas in the tube.
When the light is analyzed through a spectrometer a certain series of discrete lines of color are observed each corresponding to a different wave length. The series of lines is called an emission spectrum.
Wave lengths of the less prominent lines can be expressed in the equation 1/l=Rh(1/2^2-1/n^2) where n may have values of 3,4,5 . Rh=1.097E7.
Also an element can also absorb light at specific wavelengths known as the absorption spectrum.
The absorption spectrum has many practical applications.
Ch28.5 On of the postulates made by bohr in this theory of the hydrogen atom was the angular momentum of the electron is quantized in units of h=h/2pie of mevr=mh.
The reason angular momentum is restricted t certain values is because the condition fro a de Broglie standing wave in an electron orbit is that the circumference must contain an integral multiple pf electron wavelengths.
Ch28.6 In addition to the principle quantum number two other quantum numbers emerged from the solution of the wave equation l and m the number l is called the orbital quantum number, and m is called the orbital magnetic quantum number.
Even tackling and taking a hit has to do with physics. Football is physics in a form that everyone can understand. It is a living and breathing example of everyday physics. ... This project shows how physics is used in kicking the football. ... With out physics the kicker would not truly understand what he is doing out on the field without know some sort of physics. ...
Without motion, life would cease to exist. You can look all around you and find something that has motion. For example, staring out of your window and the leaves on a tree are blowing back and forth. This is due to the effect of the wind. When we throw a baseball or drop a glass of milk and crashes...
What Is Physics and What Are Its Uses? Physics, a branch of science, is traditionally defined as the study of matter, energy, and the relation between them. ... The medical field has seen enormous breakthroughs because of principles of physics. ... If not for physics, ultrasounds would never have been discovered and utilized. ... We have yet to see a black hole, but physics has explained what one is, and why we cannot see it. ...
• Physics has been studied for thousands of years but not until comparatively recently was our modern understand of motion established. ... • Using east, west, and etc. is not so effective in physics therefore we draw a coordinate axis to determine positives and negatives. ...
The Physics of the MRI MRI, or the Magnetic Resonance Imaging, is a machine that doctors use that provides an unparalleled view inside the human body, using the physics of magnets and radio waves. ... MRI owes this value to the science of physics, though, because without physics, there would no application of magnets and radio waves and protons and frequency, all of which contribute to the success of MRI. ...
The Physics of Baseball Baseball is the longest running professional sport in the United States. Most people do not realize it but there is a great deal of physics involved in baseball. ... In conclusion, baseball has a great amount of physics involved in it. A couple of the major points concerned with the physics of baseball are air drag and Magnus force. We are sure that most baseball players and fans do not think about the physics of baseball. ...
The topic I chose to study for assignment two is the physics behind auto racing. The first article I found on the web was called The Physics of Racing. ... This article helped me to understand the basic physics needed in understanding car racing. The first step in learning the physics behind car racing is weight transfer when braking, accelerating, and turning. ...
Modern physics has had a profound influence on many aspects of the human society. ... The real roots of physics originate from Greek philosophy in sixth century B. ... Eastern mysticism has the philosophical framework and it has been recognized as having many parallels with modern physics. ... Quantum theory is a revolutionary concept because it abolished the classical view of physics (also known as Newtonian physics, advocating that there is a world which exists apart from us and it assumes that one can observe, measure and speculate about the external world without changing it) and becam...
STAGE 2 PHYSICS THE PHYSICS OF CAR RACING INTRODUCTION Physics is the science of measurement. When theories are taken to the laboratory (or the race course) for testing, all the mathematics must boil down to quantities that can be measured. In racing, the fundamental quantities are distan...