PHYSICAL UNIVERSE(LL)-W/ACCESS >CUSTOM<
16th Edition
ISBN: 9781259974755
Author: KRAUSKOPF
Publisher: MCG CUSTOM
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Textbook Question
Chapter 4, Problem 38MC
Biofuels based on which of the following seem to have the most promise for the future?
- a. corn
- b. cellulose
- c. soybeans
- d. algae
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
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- What is motivation for using methanol fuel for electricity generation in rural areas instead of diesel fuel?arrow_forwardWhat does energy degradation mean?arrow_forward24.) Which of the following is considered an important non fuel use of petroleum based products? a. making some plastics and synthetic fabrics b. the extraction of methane gas c. distilling gasolinearrow_forward
- Biomass can be used to create ethanol fuel. It can also be used to generate electricity, that can then be used to charge electric vehicles (EVs). In this problem, you will determine whether ethanol or electricity can provide a higher biomass‐to‐wheel efficiency. Assume that one hectare of cropland can produce 14 tons of dry switchgrass per year and that dry switchgrass has an energy density of 15 MJ/kg. a. Each ton of dry switchgrass can be processed to produce 73 gallons of ethanol. Ethanol has an energy density of 92 MJ/gallon. Assume that the internal combustion engine (ICE) is 23% efficient in converting fuel energy to useful work at the wheels (motion). With what efficiency is biomass energy delivered to the wheels in this ICE car? b. Alternatively, each ton of dry switchgrass could be used directly to generate electricity, and this electricity could in turn be used to operate an EV. Assume that a biomass‐fueled power plant has a first law efficiency of 28%. There is a 7.5%…arrow_forwardThe “biological capacity” is the ability of the natural world to replenish its renewable resources and absorb the resulting waste products and pollution. Exceeding the biological capacity creates an “ecological deficit.” Discuss the potential future implications for the earth resulting from the fact that we are currently exceeding the earth’s biological capacity by about 50 percentarrow_forward2. Bread is a good source of carbohydrates. Bakers use yeast to leaven the bread. Explain why the bread rises.arrow_forward
- Indicate wether each of the following situations describes a transfer, une transformation of energy or both. a) The energy of the sun allows plants to perform photosynthesis. b) The energy real eased by a heating system makes it possible to warm the air in a house. c) Power plants produce electricity which then reaches our house. d) Food provides the energy we need to do our business daily.arrow_forwardIn the united States, which one of the following sectors consumes the most energyarrow_forward
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