If we know the power in watts of an appliance and how many seconds it is used we can calculate the number of joules of electrical energy. Efficiency is the ratio of the amount of useful energy produced. Employing these, the useful energy balance sheet is able to present a fifth category of energy losses. Examples of energy efficiency include replacing incandescent light bulbs with compact fluorescents cfls or leds, adding extra insulation to a house, or using energy star appliances that have powersaving. Bonus challenges included for higher ability students. Energy cant be created or destroyed, it can only be changed from one type into another type. This guide shows you how easy it is to cut your energy. Remember that no energy transforming device is 100% efficient.
Work, energy and power in this section of the transport unit, we will look at the energy changes that take place when a force acts upon an object. Calculate energy andor power for the following scenarios. Energy is a key principle in physics, as it allows work to be done. Efficiency is the ratio of the amount of useful energy produced energy output eout to the amount of energy used energy input ein, expressed as a percentage. Work, power and efficiency work, power and efficiency aqa. What is the gravitational potential energy of a 61. Lin 1 show all work for the following questions, including the equation and substitution with units. Energy efficiency in rubber processing favourable climate for investment treatment of other energy saving programmes. If we know the power in watts of an appliance and how many seconds it is used we can calculate the number of joules of electrical energy which have been converted to sortie other. Work, energy, power and efficiency caddys math shack.
Efficiency useful energy output x 100 total energy input. Construct a system that makes at least two energy conversions and explain this to your counselor. Because power is the rate of energy utilization, efficiency can also be expressed as a power ratio. Energy, work, and power this worksheet and all related. Then it describes the two main types of energy kinetic and potential with hyperlinks to youtube video clips, examples, and the equations with sampl. We use energy everyday at home, at school, at work, and even when youre playing.
Irp has become a formal process prescribed by law in some states and under some provisions of the clean air act amendments of 1992. Show you understand energy efficiency by explaining to your counselor a common example of a situation where energy moves through a system to produce a useful result. This folder contains work, energy and momentum worksheets downloaded from various internet sources. The table below has three different hairdryer models. Exploring solar energy student guide seven activities grades. Markscheme is provided foundation questions are included in the same set. I certify that we have complied with all the terms outlined in the idaho power heating and cooling efficiency. New commercial chiller units are eligible provided the units meet or exceed the. Work, energy, and power this worksheet and all related files are. Department of energy doe by the national renewable energy laboratory nrel, a doe national laboratory. A you tube link for this is included within the ppt should you wish to show the pupils witho. Gcse science 19 energy efficiency practise questions. Work energy power and efficiency ib worksheet 6ngexg57y0lv. Thermal efficiency coefficients for calculation of useful energy balance.
You move a refrigerator up a 10 meter high staircase. Unit 4 work, energy and momentum mr trasks physics. Power is measured in joules per second js r o watts w and is worked out using the formula. By saving energy youre helping to save the worlds energy resources like natural gas, oil and water and youre also saving money on your utility bills. Physics 112 energy, work, power and efficiency practice. The diagram shows that the generating sources have 40. A certain large wind turbine is able to transform 1,500,000j of mechanical energy. This folder contains work, energy and momentum worksheets downloaded from various.
Definitions, units of measure and conversion factors. A computer that is 87% efficient consumes 375 kwh of energy. I hereby certify that all the information on this worksheet form is accurate. Two a5 worksheets can be printed double sided, one practising energy efficiency calculations and the other calculating energy consumption. It is the rate of work done or rate of energy transfer. Energy efficiency lesson this is a fully differentiated lesson teaching pupils about energy efficiency it is suggested that you include a practical such as the custard powder with bunsen burner experiment. Appendix 1 calculating efficiency and energy use this worksheet is useful for summarizing motor information and using it to calculate the efficiency and energy use in order to assess equipment. Summary 1 watt w 1 joule per second js power w voltagev x currenta p vi energy power x time if you want the energy in joules the unit of power must be given in watts and the time in seconds. The three factors that determine the amount of potential energy in an object are. Energy, work, power and efficiency practice problems 1.
The rate at which energy is transferred is called power and the amount of energy that is usefully transferred is called efficiency. Department of energy s office of energy efficiency and renewable energy. Homework, notes, assignments and stuff therell be quizzes and in class assignments added so make sure you check for updates. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second. The concept of power is concerned with how rapidly energy is being transferred or transformed when work is done. Solar energy in pakistan premier energy pvt ltd is prime initiator for solar energy in pakistan. In physics, power is associated with energy and has a precise meaning. Use these worksheets with kindergarten and grade one students. A weirdo had the guts to solar energy can actually make the magnifying glass burn objects underneath it, causing a fire.
Energy efficiency is an improvement in technology that makes an existing use of energy more efficient, i. In this worksheet, students will learn how energy can be saved and used efficiently as well as the calculation of efficiency. Please complete this worksheet for energy saving measures. Energy efficiency is a competitive advantage in any market and an initial site survey is the start of gaining the advantage for your company. Calculating power power is the amount of work done per unit of time. By saving energy youre helping to save the worlds energy. Energy work and power quiz questions, efficiency o level physics, work and energy, energy and units. Save energy and money today you have the power to save money and energy in your own home. Creating conservation of energy problems worksheet. Energy consumptionefficiency worksheet teaching resources.
Energy calculation worksheet 1 the quality lighting teaching kits energy calculation. Calculate the work done by a 47 n force pushing a 0. Department of energys office of energy efficiency and renewable energy. Worksheet 2 shows how to carry out an initial site energy. Energy calculation worksheet 2 you will use the information on this page and the results from counting the squares on the city grid to determine the energy, cost, and carbon footprint of the lights from this city. Saving energy reduces our nations overall demand for resources needed to make energy, and increasing your energy efficiency is like adding another clean energy source to our electric power grid.
Consortium for energy efficiency cee unitary air conditioning specification located at link may not be compatible with all browsers, right click the link to copy the link location, then paste the url into a different internet browser chillers. Saving energy reduces our nations demand for the resources needed to make energy, and improving your energy efficiency is like adding another clean energy source to our electric power grid. Smart thermostat worksheet ipc heating and cooling efficiency program smart thermostat worksheet maximum of one incentive per home for idaho power use only. Calculate the work done by a 47 n force pushing a pencil 0. Jul, 2011 this website and its content is subject to our terms and conditions.
If a coalburning power plant operating at 35% conversion efficiency chemical to. Upgrading fossil fuel power plants to combined heat and power chp plants. How much work can a 22 kw car engine do in 60 s if it is 100% efficient. Calculate the kinetic energy of a truck that has a mass of 2900 kg and is moving at 55 ms. In many states, irp includes a means for considering environmental damages caused by electricity supplytransmission and identifying costeffective energy efficiency and renewable energy alternatives. We provide best solar system in pakistan with reasonable solar system price. Efficient appliance data sheet 2 data sheets for use in energy audit. If it is 20% efficient, then the bulb converts 20% of the electrical energy. A simple diagram of a hydroelectric system is shown below. An oven consumes 425 kwh of energy in order to provide 386 kwh of useful energy. Wwfd pwt efficiencyw out inx100 for ideal machines. An electric motor consumes 100 watts w of electricity to obtain 90 watts of mechanical power.
Teachers should remind students that electricity is. Efficiency of energy conversion 57 illustration 41. Your heating system is 45 percent energy efficient. During this process, the force on the cycle due to the road is 200 n and. All bulbs will be turned on for 11 hours per night. Code of practice for energy efficiency of building services. I certify that we have complied with all the terms outlined in the idaho power heating and cooling efficiency program contractor participation agreement. This educational material is brought to you by the u. A television that is 83% efficient provides 4 600 j of useful energy. A laborer working on the top of a building uses a manual hoist to lift 20 gallons of water from. Services have been performed to program requirements. Most of the energy losses of electricity generation come from conversion losses. Heating and cooling efficiency program ductless heat pump. Energy efficiency in plastics processing practical.
A certain light bulb consumes 200j of electrical energy per second, but only emits 25j of light energy per second. This guide shows you how easy it is to cut your energy use at home and also on the road. Solar this is the conversion of sunlight into electrical energy. Energy from mirrors this document was produced for the u. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. Work, energy and power the following pdf files represent a collection of classroomready think sheets pertaining to the topic of motion in one dimension.
Grade 1 science worksheets and grade 2 science worksheets and printables. The efficiency of a machine can be calculated using the following formula percent efficiency. Give students worksheets for home energy audit and assign the audit as homework. When old light bulbs expire, replace them with more efficient led lighting wear the right clothes dress for the temperature so you dont need to heat and cool as much.
1440 865 1028 648 547 1006 1053 98 1511 852 384 723 1392 1344 328 524 1362 1541 947 900 66 599 1135 13 783 796 1355 947 435 335 842 917 1353