Physics Essay

3270 Words Aug 17th, 2014 14 Pages
CRAM Exclusive
Essay Sample
Measurement and Measurement Error PHYS 1313 S06 Prof. T.E. Coan Version: 16 Jan ’06 Introduction Physics makes both general and detailed statements about the physical universe and these statements are organized in such a way that they provide a model or a kind of coherent picture about how and why the universe works the way it does. These sets of statements are called “theories” and are much more than a simple list of “facts and figures” like you might find in an almanac

middle of document…

(For example, Einstein’s theory of relativity is a refinement of Newton’s theory of relativity and quantitatively describes phenomena that Newton did not know about.) Physicists, as well as other scientists, give a kind of provisional assent to their theories, however successfully they might agree with experimental observation. Comfortably working with uncertainty is a professional necessity for them.

Making careful quantitative measurements are important if we want to claim that a particular physics theory explains something about the world around us. Measurements represent some physical quantity. For example, 2.1 meter represents a distance, 7 kilograms represents a mass and 9.3 seconds represents a time. Notice that each of these quantities has a number (9.3) and a unit (“seconds”). The number tells you the amount and the unit tells you the thing that you are talking about. Both the number and the unit are required to specify a measured quantity. Leaving either out makes your answer wrong! Pay attention.


There is a certain inherent inaccuracy or variation in any measurement we make in the laboratory. This inherent inaccuracy or variation is called experimental “error” and the word is not meant to imply incompetence on the part of the experimenter. Error merely reflects the condition that our measuring instruments are imperfect. This lack of perfection in our measuring procedure is to be contrasted with mistakes like
CRAM Exclusive

Related Documents

  • Essay on Physics

    M11/4/PHYSI/SP2/ENG/TZ1/XX 22116511 PHYSICS STANDARD LEVEL PAPER 2 Candidate session number 0 0 Wednesday 11 May 2011 (afternoon) Examination code 2 1 hour 15 minutes 2 1 1 – 6 5 1 1 INSTRUCTIONS TO CANDIDATES • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all questions. Section B: answer one questions. Write your answers in the boxes provided

    Words: 2748 - Pages: 12
  • Physics Essay

    PHYSICS 205L – S.Y. 2014-2015 * TOPIC 6 * Ohms Law * Kirchhoff's Law * Direct Current Circuit * Current * A current (I) of electricity exists in region when a net electric charge is transported from one point to another in that region. * If a charge is transported through a given cross section of the wire in a time, then the current through the wire is I = q/t. * Where: q is in COULOMBS, t is in SECONDS and I is in AMPERES (1A = 1C/s). * BATTERY * A battery

    Words: 957 - Pages: 4
  • Physics Essay

    Introductory Physics I Elementary Mechanics by Robert G. Brown Duke University Physics Department Durham, NC 27708-0305 Copyright Notice Copyright Robert G. Brown 1993, 2007, 2013 Notice This physics textbook is designed to support my personal teaching activities at Duke University, in particular teaching its Physics 141/142, 151/152, or 161/162 series (Introductory Physics for life science majors, engineers, or potential physics majors, respectively). It is freely available

    Words: 224057 - Pages: 897
  • Essay on Physics

    Physics Lab 4 (design) Design Aim To measure the effect on the heat of fusion of ice with varying percentage impurities of NaCl crystals in the water. Apparatus Ice cubes Distilled water Sodium Chloride crystals Styrofoam cup Calorimeter Digital balance with uncertainty (±0.01 g) Clamps Freezer Digital thermometer with uncertainty (±0.1°C) Glass rod Glass dish Pipette (±0.01 cm3) Variables Manipulated variables: Amount of impurity added to the water The aim of the experiment

    Words: 1029 - Pages: 5
  • Physics of Golf Essay

    get a very small ball into a cup that is several hundred yards away. What most people may not realize is that physics plays a role in just about every aspect of trying to get the ball into that cup. Every part of the game, from the tee-off until the ball drops into the cup, is affected by physics in one way or another. The purpose of this web page is to introduce you to the role that physics plays in the game of golf. Many people would argue that the ball is the single most important part

    Words: 1962 - Pages: 8
  • Essay on Physics of drums

    The Physics of the Drums Physics plays a large role in the production of music. It provides an explanation on how instruments create their sounds and how we interpret them. Many factors determine the sound created from instruments such as tension, resonance, size, shape, material and thickness. One of the world’s oldest and most basic instrument is the drum. The drum can be related to numerous topics in the science of physics. It is a member of the percussion family and usually produces sounds

    Words: 1190 - Pages: 5
  • The Physics of the Arc Essay

    ABSTRACT Several researchers have devoted efforts on studying physics of arc and descriptive models are used to explain many arc welding related phenomena. However, due to the subject complexity, doubts still emerge about the mechanisms of some phenomena related to the arc. For instance, the description about electromagnetic interactions with the arc, which governs the arc trajectory and lead to plasma jet and arc blow formation, seems to be yet controversial. Thus, the present study aimed a better

    Words: 1231 - Pages: 5
  • The Physics of Basketball Essay

    When you play the game of basketball, you are not aware of at the time some of the physics that are going on all around you. For example, you have all the players using force to accelerate and go to top speed. You have the jump shot which uses vertical and horizontal forces. The spin of the ball affects its place once it hits the rim or the backboard. Dribbling comes into major play because of all the different types of forces and actions going on around it. There is two different types of shots

    Words: 757 - Pages: 3
  • Physics of Soccer Essay example

    The Physics Of Soccer Soccer is a sport that’s very challenging and during the course I’ve found physics can also be described as challenging. As far as I was concerned soccer and physics were both challenging and that was all they had in common, consequently upon researching them both this I found that I was wrong. For me this was nothing new because I’ve found that physics isn’t a subject that can be skimmed, but rather it has to be studied to the finest detail. Those small details if missed can

    Words: 1585 - Pages: 7
  • Physics Question + Ans Essay

    Physics pre-assessment research task 1. Describe de Broglie’s proposal that any kind of particle has both wave and particle properties De Broglie suggested that if light can behave as both a wave and as a photon, particles could also have dual character. He proposed that all particles had wave properties as well as particle properties. He proposed that the wavelength is inversely proportional to the momentum of the particle, now known as the de Broglie wavelength of a particle and given by,

    Words: 1858 - Pages: 8