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Ozone depletion
Environment
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Earth
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Ozone depletion
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Gone With the Wind

Michael Treacy 3/3/2010 Pd. 3 Ozone Hole @ TD 1. What is the Ozone and why do we need it in our atmosphere to have a healthier planet? The Ozone is the Gas O3. This gas is located in the Stratosphere and absorbs UV Rays. We need the ozone in our atmosphere because it absorbs 98% of the UV Rays. Without the ozone to filter all these UV Rays many animals would have medical / health problems. 2. Describe how the ozone protects us. The ozone protects us by filtering out and absorbing most of the UV Rays before they reach the earth. Most of the Rays are biologically harmful and know to damage tissues and cells. 3. How is a chlorine atom harmful to the ozone in the stratosphere?

Physics Old Free Response

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SHS AP QUIZ 8 KEY 1976 B1 The two guide rails for the elevator shown above each exert a constant friction force of 100 newtons on the elevator car when the elevator car is moving upward with an acceleration of 2 meters per second squared. The pulley has negligible friction and mass. Assume g = 10 m/sec2. (a) On the diagram below, draw and label all forces acting on the elevator car. Identify the source of each force. (b) Calculate the tension in the cable lifting the 400-kilogram elevator car during an upward acceleration of 2 m/sec2. (Assume g 10 m/sec2.) (c) Calculate the mass M the counterweight must have to raise the elevator car with an acceleration of 2 m/sec2.

Physics Definitions and Laws

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PHYSICS DEFINITIONS AND LAWS Grade 11 1. Average velocity is the rate of change of position. t d vave ? ? = ? ? 2. Average acceleration is the rate of change of velocity. t v aave ? ? = ? ? 3. Newton?s Laws of Motion: I. All objects at rest will stay at rest and all objects in motion will remain in uniform motion unless acted upon by an unbalanced force. II. If an unbalanced force acts on an object, then that object will accelerate in the direction of that force such that the acceleration is directly proportional to the force and inversely proportional to the mass of the object. m F a net ? ? = III. If object A exerts a force on object B, then object B will exert an equal force in the opposite direction on object A.

Metric Prefixes

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Metric Prefixes

Prefix: Symbol: Magnitude: Meaning (multiply by): zetta- Z 1021 1 000 000 000 000 000 000 000 exa- E 1018 1 000 000 000 000 000 000 peta- P 1015 1 000 000 000 000 000 tera- T 1012 1 000 000 000 000 giga- G 109 1 000 000 000 mega- M 106 1 000 000 kilo- k 103 1000 hecto- h 102 100 deka- da 10 10 deci- d 10-1 0.1 centi- c 10-2 0.01 milli- m 10-3 0.001 micro- ? (mu) 10-6 0.000 001 nano- n 10-9 0.000 000 001 pico- p 10-12 0.000 000 000 001 femto- f 10-15 0.000 000 000 000 001 atto- a 10-18 0.000 000 000 000 000 001 zepto- z 10-21 0.000 000 000 000 000 000 001

Reliability Physics and Engineering McPherson chapter 5

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Chapter 5 Gaussian Statistics ? An Overview The Gaussian distribution (normal or bell-shaped distribution) is a widely used statistical distribution and it is generally used as the foundation for statistical qual- ity control. Simply measuring the time-zero values of a parameter (resistor values, mechanical tolerances, children heights, class grades on a test, etc.) can result in a distribution of values which can be described by a normal distribution. 5.1 Normal Distribution The normal distribution f(x) shown in Fig. 5.1 is defined by the equation: f (x) = 1 ? ? 2? exp { ? [ x ? x50 ? ? 2 ]2 } . (5.1) +??? x50 Parameter: x f(x) Histogram Parameter : x Fr eq ue nc y

newron bernouli archimedes

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8th grade

Arroyo 1 Mikayla Arroyo Period 6 1-26-10 Newton, Bernoulli, or Archimedes Newton?s, Bernoulli?s, and Archimedes? laws and principles are essential to our understanding of life and physics. Such as, when we can throw a ball harder, we make it go further, why objects float or sink, and how a wing of an aircraft or bird helps it fly. Out of the three physics concepts, Newton?s laws are the most important, Bernoulli?s principle is the second most, and then Archimedes? principle

Kinematics Review

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kinematics
motion
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Kinematics Uniform Motion How can uniform motion be I. Any object moving at a constant velocity expressed and how can it be II. When graphed, the line of best fit represents the average speed calculated? a. y = mx + b; where ?m? is the constant (slope) and ?b? is the initial value b. velocity = displacement / time (m/s) Vectors and Scalars What is the difference betw- I. A vector is a measurement that has a direction component een a vector and a scalar? a. Velocity and displacement are vector quantities (e.g. 5 km/h [S]) II. Speed and distance are scalar quantities (e.g. 15 m away) Uniform Acceleration What is uniform acceleration I. Accelerated motion (non-uniform) occurs when an object travelling in a

Physics SAT Formulas

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SAT 2.
Sat II

VECTORS Dot Product Cross Product Magnitude Direction X-, Y-Components Vector Addition KINEMATICS Velocity of Two-Dimensional Projectiles DYNAMICS Newton?s Second Law Formula for Force of Kinetic Friction Formula for Force of Maximum Static Friction WORK ENERGY AND POWER Work Work Done by Gravity Kinetic Energy Work-Energy Theorem Potential Energy Gravitational Potential Energy Mechanical Energy Average Power Instantaneous Power SPECIAL MECHANICS Hooke?s Law Period of Oscillation of a Spring Frequency Potential Energy of a Spring Velocity of a Spring at the Equilibrium Position Period of Oscillation of a Pendulum Velocity of a Pendulum Bob at the Equilibrium Position LINEAR MOMENTUM Linear Momentum

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