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Physics

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Newtons 1st Law Of Motion

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Newtons Law of Inertia An object in motion or in rest tends to stay in rest until an outside force is applied to it to change its state of motion. An objects resistance to a change in its state of motion is called inertia. Inertia is measured by an object?s mass (NOT WEIGHT): Example: Which has more inertia a 3250 lb Elephant or a 2500 lb car moving at 25 mph? Answer: the elephant. The elephant has more mass which means that it has more inertia. It takes more force to change the elephants state of motion (make it move) than it does to stop the car because the elephant has more mass.

Thermal Physics

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THERMODYNAMICS/ THERMAL PHYSICS Sections 19.1, 19.3, 19.3, 19.4, 19.5, 20.1, 20.4, 20.7 Chapter 19: Temperature and the Zeroth Law of Thermodynamics. Section 19.1 Temperature and Thermal Equilibrium Thermal contact: energy between the two objects can be exchanged. Thermal Equilibrium: a situation in which two objects would not exchange energy by heat or electromagnetic radiation if placed in thermal contact. Zeroth Law: (law of equilibrium) if objects A and B are separately in thermal equilibrium with a third object C, then A and B are in thermal equilibrium with eachother. Temperature: a measure of the average kinetic energy of molecules Two objects in thermal equilibrium are at the same temperature

Magnestism and Electricity

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Electricity and Magnetism Electrostatics: LAWS: Like charges repel Unlike charges attract Neutral objects attract charged objects (temporary induced dipoles (London dispersion forces) that cause separation of charge. Fattraction > Frepulsion Electric charge is always conserved Charging by induction: Charging: neutral to start By Grounding: a neutral object that can receive or supply large numbers of electron without significantly altering its own charge (earth and people) Come away with opposite charge Charging by Conduction: through contact and electrons are equally transferred and equally shared, kiss up and repel, and both have the same charge (electroscopes) same charge

Work and Energy Theorem

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Work and Energy Theorem Kevin Objective: The objective of this experiment is to investigate what work is, and how it relates to energy. We will learn different forms of energy and how energy is used to determine the relationships between work and energy. Data and Calculations: Part A: Work Done by a Constant Force Mass of Weight 199.8 g Starting Time 1.80 sec Starting Position 0.006 m Ending Time 5.00 sec Ending Position 0.215 m Average Force 2.017 N Integral 0.3152 mN ?U = mg?h ?U = (0.1998kg)(9.81m/s2)(0.215m ? 0.006m) ?U = 0.4096 Nm The average work is the average force multiplied by ?h. Wave = (2.017 N) (0.215m ? 0.006m) Wave = 0.4216 The percent difference between the calculated ?U value and the average work is

Conservation of Energy Lab

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Conservation of Energy Kevin D. Edgerton Objective: The objective of this experiment is to study the law of conservation of energy and see how the conservation of energy equation is used. . Data and Calculations: Part I: Bouncing Ball Mass of Ball 417.2g Ranger to floor distances 0.771m 0.778m 0.765m 0.769m 0.775m Average 0.7716m The Total Energy drops to near zero when the ball hits the ground. It does not violate the law of conservation of energy because the energy lost in the collision with the ground is not accounted for by the measurements of potential and kinetic energy. Because of this, the total energy decreases after each bounce. With a lighter ball there may be less energy lost during the collisions.

Conservation of Energy Lab

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Conservation of Energy Kevin D. Edgerton Objective: The objective of this experiment is to study the law of conservation of energy and see how the conservation of energy equation is used. . Data and Calculations: Part I: Bouncing Ball Mass of Ball 417.2g Ranger to floor distances 0.771m 0.778m 0.765m 0.769m 0.775m Average 0.7716m The Total Energy drops to near zero when the ball hits the ground. It does not violate the law of conservation of energy because the energy lost in the collision with the ground is not accounted for by the measurements of potential and kinetic energy. Because of this, the total energy decreases after each bounce. With a lighter ball there may be less energy lost during the collisions.

Using integration to find position and velocity

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Acceleration, velocity, and Position The connections between position, velocity, and acceleration formed one of the important themes of differential calculus. We will find that these relationships also form an important application of the definite integral, especially in cases in which one of the quantities varies with time.? To discuss these concepts, we will use the notation:? Relating velocity to acceleration? Remembering that the acceleration is defined by the derivative? we can apply the Fundamental Theorem of Calculus to write this relationship in the form? If we pick call the initial time??and the final time??, then this integral has the form? Relating Position to Velocity? The velocity is defined by the derivative? By the Fundamental Theorem of Calculus,?

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