Increase the momentum of the object over a long time 8. Most street barriers are made of hard rubber or plastic materials that easily give in or dent when hit. Why is this so? A. To reduce the vehicle’s kinetic energy when it collides with the barriers B. To store potential energy in the bumpers of vehicles C. To reduce the impact force when hit by a vehicle D. To reduce the impact time when the barriers hit the vehicle 9. What is the momentum of a 20 kilogram cart moving
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FREE FALL AND CONSERVATION OF MECHANICAL ENERGY ABSTRACT Free fall is defined as the ideal falling motion of an object that is subject only to the earth’s gravitational field. To prove the law of conservation of energy‚ the free fall motion of an object can be represented through 3 different analyses; position of the object vs. time‚ velocity of the object vs. time‚ and acceleration of the object vs. time. It is observed in this ball toss experiment‚ at any point during the free fall period‚
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http://www.phys.unsw.edu.au/ASISTM/workmodule.html [pic] Work‚ energy‚ power and force. A good way to get a feeling for work and power is to produce some yourself. In this simple exercise you will measure how much work you do and calculate how powerful you are. Safety You will need some stairs that you can safely run up‚ preferable more than one floor. Normally‚ you shouldn’t run on stairs. So you should • not run up stairs if you are sick or have a medical problem • check that your teacher
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of conservation of energy? What are the dampening properties of a real mass-spring system that vibrates vertically? Hypothesis If a real vibrating spring suspended vertically undergoes damped harmonic motion‚ then it will support the law of conservation of energy because the energy at all points of the motion is equal. Even though the total amount of mechanical energy decreases over time‚ the other energy is not lost‚ but instead becomes thermal energy. This thermal energy is produced from friction
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Examples of Radiant Energy The term radiant energy refers to energy that travels by waves or particles‚ particularly electromagnetic radiation such as heat or x-rays. Radiant energy is created through electromagnetic waves and was discovered in 1885 by Sir William Crookes. Fields in which this terminology is most often used are telecommunications‚ heating‚ radiometry‚ lighting‚ and in terms of energy created from the sun. Radiant energy is measured in joules. Ads by Google Best Solar Investments
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Heat energy Temperature – measure of the average KE of the particles in a substance‚ measured in degrees Celsius or degrees Kelvin. Celsius 0⁰C (freezing point of water) to 100⁰C (boiling point of water) Kelvin 0 K (absolute zero‚ particles stop moving theoretically)‚ equivalent to -273.15⁰C. Uses the same scale for increase‚ ie. a 1⁰C increase in temperature equates to a 1K increase in temperature. Heat – amount of energy transferred‚ measured in Joules (J) Kinetic Energy‚ Thermal
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Lab #7: Thermal Energy Heat is thermal energy being transferred from one place to another‚ because of temperature changes. This can take place by three processes. These three processes are known as conduction‚ convection‚ and radiation. When we place two objects with different temperatures in contact with each other‚ the heat from the hotter object will immediately and automatically flow to the colder object. This is known as conduction. Some objects make excellent conductors of heat while
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Heat Heat is the transfer of energy from a hot object to a colder object‚ such as when toasting a slice of bread. The heat transfers onto the slice of bread which results in warm toast. When the slice of bread is heated‚ many things change; for example‚ the texture turns crunchy‚ the bread hardens‚ and the colour darkens. Where does the toast get its heat from? The toaster. Toaster A toaster is an electric small appliance designed to toast sliced bread by exposing it to heat. When a slice of bread
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immensely important role in our lives. In both the articles Energy Story by the California Energy Commission and Conducting Solutions by Rodney Schreiner we are given a fairly in-depth explanation to this fascinating tool. In a 2011 TED talk a speaker named AnnMarie Thomas introduces us to an intriguing concept‚ using playdough to conduct electrical experiments. All of these sources purposes are to help us better understand electricity. “Energy Story” starts by introducing us to the basis of everything
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What is wind energy? Wind energy is energy that is created by using the wind to generate power. It is a form of kinetic energy that can be transformed into mechanical energy or electricity. What is solar energy? Solar energy is energy derived from the sun. Used synonymously with solar power‚ it is the ability of the sun to convert sunlight into electricity. What is geothermal energy? Geothermal energy is energy generated from the heat beneath the Earth’s surface. It is a renewable energy because it
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