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- 4 نقاط * :An isolated system Is a specified region where transfer of energy and/or mass take place Is one in which mass within the system is not necessarily constant Is a region of constant mass and only energy is allowed to cross the boundaries Cannot transfer either energy or mass to or from the surroundings None of these answers OBook: Sustainable Energy, Si Edition, 2nd Edition by Richard A. Dunlop Chapter 16 - Problem 1. How many tonnes of wood per day would be needed for a wood-fired generating station that produces 1,000MW continously (typical of a coal-fired facility) at 35% efficiency?Weight: 60 kg Height: 159 cm Waking up & Moking Bed Preparing for Brunch Studying Stretching and Walking Washing Dishes Watching Netflix 10 minutes 20 minutes 10 hours 1 hour and 30 minutes 30 minutes 3 hours 60kg 159cm 4.9 1.4 1.9 4.6 3.5 1.4 Calculate for the daily energy spent (whole 24 hours). Express both in Joules and dietary calories. Note: For your mass, use the current mass you have at the beginning of your data gathering.
- 5) A 2,200 kg car goes flying off a highway overpass in a Hollywood movie. How much potential energy does the car have if the overpass is 25 meters high?After eating a 200 g pottle of yoghurt, a person decides to go for a run to burn off the extra energy. The yoghurt provides 5.4 MJ kg−1, and he is able to raise his metabolic rate to 220W while running. How long does he have to run?C- Explain a process by which we can produce electricity from Sunlight.
- A 42 client with a body mass of 74 kg is interested in jogging on the treadmill as their primary means of exercise, while they listen to their "pump-up" music playlist that lasts exactly 28 minutes. To be sure they get the recommended volume of exercise each week, you'd like to have your client burn 350 kcal in each jogging session. To achieve this, what should your client set as the treadmill speed while running, in miles per hour?Which of the following is a true statement about passive solar heating? It is effective only during the summer months. It is effective only during the summer months. A It is based in part on the principle of the greenhouse effect. It is based in part on the principle of the greenhouse effect. B It is not used to heat commercial buildings. It is not used to heat commercial buildings. C It is not efficient because it cannot produce high-quality energy. It is not efficient because it cannot produce high-quality energy. D It produces more pollution than heating with an electric heat pump.A woman expends 95 kJ of energy in walking a kilometer. The energy is supplied by the metabolic breakdown of food intake and has a 35 percent efficiency. If the woman drives a car over the same distance, how much energy is used if the car gets 8.8 km per liter of gasoline (approximately 20 mi/gal)? The density of gasoline is 0.71 g/mL, and its enthalpy of combustion is 49 kJ/g. Enter your answer in scientific notation. Compare the efficiencies of the two processes. kJ (driving)/ kJ (walking)
- 3. A container 50 ft by 100 ft by 20 ft deep is half-filled with a liquid (filled to a depth of 10 ft). How much work is done in pumping all the liquid out of the container to a height of 2 ft above the top of the container? (The liquid's density is 60 lb/ft³.) Your answer should include units.number 3In an attempt to find the food calories provided by various fruits, you collect the following information, which is given in various units: pineapples have 125 Calories of energy, mangos have 271,960 joules of energy, and grapes have 87,000 calories of energy. Select the option that correctly ranks the fruits from greatest to least energy supplied.