Work & Energy Physical Science Ms.Barconey May 8‚ 2013 Work is the transfer of energy to an object by the application of a force that causes the object to move in the direction of the force. Three examples of work would be a tractor pulling a float‚ a mother pushing a baby stroller‚ and a body builder lift a barbell over their head. Work is measured in joules and the formula for work is Work=Force*Distance. Power is a quantity that measures the rate at which work is done
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examples of work done=force x distance What is work? Work in physics is the transfer of energy; work is done on an object when an applied force moves it through a distance. The link between work and energy is work done equals energy transferred. The units for the two are also the same (joules). E.g. 500J of work = 500J of kinetic energy. Work is calculated with the formula: work done=force x distance moved For example‚ if a force of 10 newton (F = 10 N) acts along point that travels 2 meters
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Energy Management H.W 1 1. A hospital is considering the purchase of a large commercial laundry dryer‚ and is attempting to decide between an electric and natural gas powered system. If electricity costs $0.06/kWh and is used with an efficiency of 90%‚ what is the equivalent price of natural gas per therm if it can be burned with an efficiency of 80%? Dimensional Analysis |$.06 |29.3 KWh |.8 efficiency | |.90 efficiency |1 therm
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Renewable Energy is Best Michelle Johnson HUM/111 March 26‚ 2011 L. Flemister Renewable Energy is best America’s dependency on foreign oil is costing us more than just money; it costs us our clean air and potentially thousands of jobs in America. Our nation needs to create its own renewable energy. The dependency on other countries is crippling our economy. Drilling for oil in the United States is not the answer. We need to take better care of our planet and that each of us must
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Hydraulics Prof. B.S. Thandaveswara 9.3 Application of Specific Force and Specific Energy 1. Determine the energy Loss in a NHJ Solution: Applying Momentum equation γQ ( V2 − V1 ) = P1 − P2 g γ Q 2 ( y1 − y 2 ) gb 2 y1y 2 2 2 2 = y1 − y 2 ( ) Q2 2gb Q2 b 2 = ( y1 + y2 ) y1y2 4 = q2 q 2 ( y1 + y 2 ) y1y 2 = (1) 2g 4 Specific energy equation y1 + V12 V2 = y 2 + 2 + ∆E 2g 2g Q2 2 2gy1 b 2 ∆E = y1 + − y2 − Q2 2 2gy 2 b 2 1 ⎤ q2 ⎡ 1 ∆E = ( y1 − y
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Energy in food lab report Aim: How much energy there is in food. Hypothesis: If I work out how much the water temperature has risen by burning food underneath water‚ the mass of the water and the mass of food I can work out how much energy was in the food. Introduction: This experiment is about how much energy there is in food. There are a few different types of energy‚ the one we are looking at is chemical energy. Some other types of energy are: thermal energy which is heat‚ magnetic energy which
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the passage of energy‚ particularly heat or electricity‚ through something • Rate of Change- the ratio of the difference in values of a variable during a time period to the length of that time period • Calorimeter- an apparatus for measuring the amount of heat given out or taken in during a process such as combustion or change of state. The measurements are often made by observing the amount of solid liquefied‚ or liquid vaporized‚ under set conditions. • Conservation of Energy- the principle
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that could power a jet‚ NASA engineer Bilal Bomani presents his work in turning the field of aviation into an environmentally friendly service. At NASA’s GreenLab Research Facility‚ he uses algae and halophytes to create a self-sustaining‚ renewable energy ecosystem that doesn’t consume arable land or fresh water. Bomani’s work has a set of guidelines which it must follow. In order to be truly Green‚ Bomani’s fuel must be Sustainable‚ Alternative and Renewable. Meaning that it must have a low carbon
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forces involved. Two of the main forces experienced are called potential energy and kinetic energy. Potential energy is the energy an object has depending on the position of it. For example the higher an object is the higher the potential energy is and the lower an object is the less potential energy it will have. Kinetic energy is also a main type of force that is involved with rollercoasters. Kinetic energy is the energy an object will have as it is in motion. There are many different types of
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Arul Prasath .K School of Electronics Science‚ VIT University‚ Vellore - 632014‚ TamilNadu‚ India Arulprasath.kvit01@gmail.com; Abstract This paper deals with the discussion of mass and energy in light. Light consist of very less amount of mass that it could not be measured. This paper is based on the concept that when the mass of light is increased it can move the objects. So‚ the light with increased mass can be used in many applications in practical life such as producing electricity. Increase
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