What Is Physics And What Are Its Uses? :: essays research papers

What Is Physics and What Are Its Uses?Physics, a branch of science, is traditionally defined as the study ofmatter, energy, and the relation between them. The interaction between matterand energy is found everywhere. In order for matter to move, it requires someform of energy.Sports show umteen good examples of the relationship between matter andenergy. For instance, a pitcher requires energy to throw a base thump at theincredible speed and accuracy that is mandatory to keep the batter from using hisenergy to try and hit the ball. The batter exhibits the need for a certainflight of steps because he/she needs to hit the ball hard enough and keep it highenough to sail over the outfield wall. On the other hand, the batter must becertain to keep the trajectory low enough so that the ball will reach the fence.Trajectory is also seen in basketball, where players must shoot the ball withenough arch to choose over the front of the rim, and go through the hoop. Theenergy required to do thi s comes from not only the arms, but the legs as well.The medical field has seen enormous breakthroughs because of principlesof physics. Doctors argon now able to use lasers for surgery. Lasers are basedon the physical principle of light, and are devices for the creation andamplification of a narrow, intense beam of reproducible light. New lasermicrosurgery can actually alter the shape of the cornea in the eye so thepatients eyesight can return to normal, and he/she will no longer need thosebothersome glasses. ultrasound is used in the medical field for destroyingvarious unwanted substances in the body such as kidney stones. Ultrasound usessound waves to dissolve these foreign bodies. If not for physics, ultrasoundswould never have been discovered and utilized. MRI scans, another newdiscovery, are able to show a dispatch three dimensional picture of theinterior structure of the body, and are extremely valuable in hospitals. Thesescans are based on the principles of electromagnetis m, and the phenomenon thatnuclei of some atoms line up in the presence of an electromagnetic field.Understanding the dark matter of the universe, which has remained amystery for quite some time, is based primarily on theories of physics. We have save to see a black hole, but physics has explained what one is, and why wecannot see it. Otherwise we would have never known that it is an extremely