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Physics

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gas milage lab

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experiment

Tire Pressure Problem: How the temperature of water affects plant growth. Observations. These days we are running out of everything so I think that we should improve the speed and the size of the plant. So by putting different temperature soils in the plant it should probably make the plant bigger. Hypothesis: If the plant is put in the cold soil, then the plant will increase its rate of growth IV C DV Chart: Independent Variable (IV) Constants Dependent Variable (DV) Temperature of water Cold (15 degrees C) Regular (25 degrees C) Amount of light Plant Growth Amount of soil Type of soil Type of water Amount of water Type of enviorment

Physics Exam Review

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Page 43, #75. A rocket rises vertically, from rest, with an acceleration of 3.2 m/s2 until it runs out of fuel at an altitude of 1200 m. After this point, its acceleration is that of gravity, downward. a. What is the velocity of the rocket when it runs out of fuel? 2a?d = V22 ? V12 (2)(3.2)(1200) = (x2)(02) 7680 = x2 ?7680 = ?x2 x = 87.6 m/s b. How long does it take to reach that point? ?t = ?v/a 87.6/3.2 = 27.4 s c. What maximum altitude does the rocket reach? T = 87.6/9.8 = 8.9 s 27.4 s to reach 1200 m, 8.9 s the rest of the way ?d = V1?t + ? a?t2 (from a certain speed) (-?)(9.8 (gravity took over))(8.92) + (87.6)(8.9) = 392 m + 1200m = 1592 m d. How much time (total) does it take the rocket to reach max altitude? 27.4 s + 8.9 s = 36.3 s total

The Relationship between Position, Velocity and Acceleration Graphs

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Relationship between Position
Velocity and Acceleration Graphs

Ravi Prathipati Title: The Relationship between Position, Velocity and Acceleration Graphs Date: 9/8/2011- 9/9/2011 Problem Statement: What is the relationship between the position, velocity and acceleration graphs of an object? Independent Variable- Time(t(s)) Dependent Variable-Position (x(m)) Procedure: Gather all materials needed in order to perform experiment. Draw predicted graphs in the assigned graphs. Perform movement and then graph position, velocity and acceleration of the motion of the cart starting from rest and rolling down the incline without using a motion detector at the start. Then graph position, velocity and acceleration of the cart slowing after an initial push with using the motion detector at the start and stop it at the highest point.

SAT help

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Dack

The Iliad?and?The Odyssey?are first and foremost, poetry.??However, as illustrated herein, they do have a good deal of historical merit.??The nature of the oral tradition of Dark Age?Greece?and archaeology illuminate the subject of the historicity of the Homeric poems.?They help scholars to fill in the gaps of the historical record.??Homer looked back into history to a previous time whose nature, in some respects, still eludes the historical record.??Homer was a poet who preserved much of Greek myth and legend for his audiences, and managed to create a piece of art that preserved something of their history as well (albeit inaccurate in some areas).??Percy Bysse Shelley observed that?every good historian is a poet.??As in the case of Homer, it can be said that the reverse is not always

acceleration lab activity

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acceleration lab

Name:_______________________ Acceleration Lab Objectives: In this lab, you will be studying acceleration due to gravity by observing Hot Wheels cars on inclined planes. Your goal will be to determine the acceleration of the car with the inclined plane at different angles. The lab will show how graphs of displacement versus time and velocity versus time can be used to find acceleration. Materials: Hot Wheels car, 1m inclined plane, 2 notebooks, meter stick, stopwatch Procedure: 1) Begin by designating one person to be the car holder, 2 people as distance markers, one person as a recorder, and one as a timer. 2) Raise one end of the inclined plane by placing the end on one notebook. 3) Trial run: Have the car holder hold the car at the top of the ramp (at 0cm). When the car holder

Physics Definitions and Laws

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Physics

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.

ap em

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36. Three 1/2 ?F capacitors are connected in series as shown in the diagram above. The capacitance of the combination is (A) 0.1 ?F (B) 1 ?F (C) 2/3 ?F (D) ? ?F (E) 1/6 ?F 37. A hair dryer is rated as 1200 W, 120 V. Its effective internal resistance is (A) 0.1 ? (B) 10 ? (C) 12? (D) 120 ? (E) 1440 ? 38. A point charge +Q is inside an uncharged conducting spherical shell that in turn is near several isolated point charges, as shown above. The electric field at point P inside the shell depends on the magnitude of (A) Q only (B) the charge distribution on the sphere only (C) Q and the charge distribution on the sphere (D) all of the point charges

Lasers

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Physics
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Physics Lasers

Lasers Light Amplification by Stimulated Emission of Radiation The laser gets energy from electrons, which are transformed, into light. How does an electron accept energy? Illuminate the atom with light radiation of suitable color (frequency) Stimulated absorption The energy of the photon E2 ? E1 = hf What happens after absorption? Spontaneous emission Fluorescence Stimulated emission Increased energy Basic principle of laser Small input, large output Why is a laser very powerful? A laser can produce a narrow beam of coherent light of identical frequency, phase, and colorization Laser light is generally a monochromatic light; yet, there are lasers that emit different wavelengths of light simultaneously Random Source Waves emitted from the source have random phase Ex. Flash light

Lasers

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Physics
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Physics Lasers

Lasers Light Amplification by Stimulated Emission of Radiation The laser gets energy from electrons, which are transformed, into light. How does an electron accept energy? Illuminate the atom with light radiation of suitable color (frequency) Stimulated absorption The energy of the photon E2 ? E1 = hf What happens after absorption? Spontaneous emission Fluorescence Stimulated emission Increased energy Basic principle of laser Small input, large output Why is a laser very powerful? A laser can produce a narrow beam of coherent light of identical frequency, phase, and colorization Laser light is generally a monochromatic light; yet, there are lasers that emit different wavelengths of light simultaneously Random Source Waves emitted from the source have random phase Ex. Flash light

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