EGEE STUDYMATES Energy can be converted to work heat radiation BTU hr is a unit of power One BTU of energy is enough to heat 1 lb of water by 1 F One calorie is defined as the amount of energy that is required to raise the temperature of 1g of water by 1 C A 100 watt incandescent light bulb is operated for 120 hours and a 15 watt fluorescent light bulb is operated for the same period of time At 10 cents per kWh what is the cost savings of the fluorescent bulb 1 02 if Peter expends 1 500 calories running a mile in one hour and Samantha burns 1 500 calories riding a bike in forty five min which one of the two spent the greatest amount of energy The same If Peter expends 2 000 calories running a mile in one hour and Samantha burns 1000 calories riding a bike in thirty minutes Who exerted the greatest amount of power The same An old refrigerator which is rated at 494 Watts and runs for 13 hours everyday is replaced by a new energy efficient refrigerator which is rated at 221 Watts and is expected to run 8 hours everyday 20 2 True False True Nuclear fusion is a renewable source of energy True A BTU has more energy than a calorie True Energy can be converted from one form to another True Geothermal heat can be used to produce electricity Wind Tiday Energy Coiled Spring are all energy sources examples of mechanical energy An energy source is nonrenewable if the source cannot be regenerated in a reasonable time period Units of energy when divided by time of usage give units of Power From the following Nuclear fission Petroleum where all energy sources are non renewable energy sources If Peter spent 2 000 calories running in 1 hour and Samantha burns 1000 calories riding in 30 min Peter more power If Peter spent 1 000 calories running in 1 hour and Samantha burns 1000 calories riding in 45 min Sam more power o From a computer the useful energy output is Radiant energy o A Food calorie Cal is equal to one kilocalorie o o o One Watt equals the production or use of one joule of energy per second o Photosynthesis is a process by which solar energy is converted to chemical energy o Calorie second is a unit of Power o The middle east is richest in Petroleum o US is the richest in coal o The energy in fossil fuels such as coal is stored as Chemical energy o In a windmill Mechanical energy is converted to electrical energy o Units of power when multiplied by time of usage give Energy o In fossil fuels energy is stored in bond as chemical energy o Therm is a unit that is generally used to measure the energy contained in natural gas o One Kilo calorie is equal to 1000 calories o A Joule is an energy unit used by scientists and engineers o Energy in Uranium is stored as Nuclear energy o One British thermal unit BTU is defined as the amount of energy to raise the temperature of 1lb of water through 1F o One calorie is the amount of energy needed to raise the temperature of one gram of Water by one degree C o Fossil fuels are formed from the remains of plants or sea creatures millions of years ago Lesson 1 General Calculations General Crossword 1 EGEE STUDYMATES Lesson 2 General What percentage of the US energy demand is met by renewable energy sources What of the US petroleum demand is met by imports ballpark figure Which fuel supplies the greatest proportion of primary energy in the US o Less than 10 o Around 50 o Petroleum At the present rate of consumption how long are the US petroleum reserves expected to last ballpark figure o Less than 10 years Calculations A country in Asia has an estimated reserve of 35895 million barrels of oil The country uses 9947399 barrels of oil per day At this rate how many years will the reserves last o 9 89 years The answer is 9 89 because the country uses 9947399 PER DAY So you must multiply that number by 365 to get the annual number 3 630 800 635 Then divide 35895 million barrels in reserve by that number 35 895 000 000 3 630800 635 9 8862 That s how you get 9 89 Energy used in china is projected to increase at the rate of 3 6 year for the next few decades How long will it take for energy consumption in China to double o 19 44 years take Kunesia to double its current usage in years o 35 take Kunesia to double its current usage in years Energy used in Kunesia is projected to increase at the rate of 2 per year for the next few decades How long will it Energy use in Kunesia is projected to increase at the rate of 3 5 per year for the next few decades How long will it o 20 True False F requirements T F T General In the next 20 years it is expected that renewable energy sources will supply more than half of US energy To produce one dollar worth of goods the US uses less energy than any other country in the world The US has highest crude oil reserves in the world The fastest growth in the energy use is projected for some of the Asian nations At the present rate of consumption reserves for which one of the following fuels will last the longest time Which energy source accounts for the greatest proportion of electricity generation in the US Resources represent the portion of demonstrated energy resources that Is known to exist or even suspected to exist regardless of technical or economic viability In which of the following regions of the world is the per capital energy consumption the highest in the world o Coal Coal o o o North America The US gets most of its energy from Nonrenewable energy sources which include the fossil fuels oil natural gas and At the present rate of consumption reserves for Coal will last the longest time Coal accounts for the greatest proportion of Electricity generation in the US North America is the per capital energy consumption the highest in the world Most of the increase in energy is projected to be in Asia Growth in the World s energy consumption can be mathematically represented by Exponential At the present rate of consumption the US petroleum reserves are expected to last less than ten years Petroleum supplies the greatest proportion of primary energy in the US In the next 20 years oil will supply more than half of the US energy requirements In the US Biomass wood contributes highest share of renewable energy followed by hydro electric Crossword coal 2 EGEE STUDYMATES Lesson 3 General Knowledge Which one of the following is true about energy conversion devices o Total energy input useful energy output energy dissipated to the surroundings Which one of the following devices is …