Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 20, Problem 3PEB
To determine
The number of eukaryotic cells required to use
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A high jumper of mass 60kg consumes a meal of 3.00 x 10³ kcal prior to a jump. If 3.3% of
the energy from the food could be converted to gravitational potential energy in a single jump, how high could the athlete jump?
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A 70-kg physicist is running up the stairs of the physics building and makes it up 48 m vertically in 1 minute.
(a) what is the physicist's power output while running up the stairs?
(b) if the physicist's work efficiency is just 3%, at what rate were they using metabolic energy?
(c) if the physicist's metabolism can provide 5.6x10^6 J of energy before they need a rest, how long could they continue running up the stairs?
A human heart consumes about 1 J per heartbeat. About how many calories of energy must food furnish to a person each day to supply this energy? Forcomparison purposes, one nutritionist’s calorie of food energy is equivalent to 4184 J.
Chapter 20 Solutions
Integrated Science
Ch. 20.1 - Metabolic processes include a. nutrient...Ch. 20.1 - Tanning as a result of exposure to the sun is an...Ch. 20.4 - Prob. 3SCCh. 20.4 - Prob. 4SCCh. 20.8 - Prob. 5SCCh. 20.9 - Prob. 6SCCh. 20.9 - Prob. 7SCCh. 20.9 - Prob. 8SCCh. 20.9 - Prob. 9SCCh. 20.9 - Prob. 10SC
Ch. 20.11 - Prob. 11SCCh. 20.11 - Prob. 12SCCh. 20.11 - Prob. 13SCCh. 20.12 - Prob. 14SCCh. 20.12 - Prob. 15SCCh. 20 - Prob. 1CQCh. 20 - How do diffusion, facilitated diffusion, osmosis,...Ch. 20 - Prob. 3CQCh. 20 - Prob. 4CQCh. 20 - Prob. 5CQCh. 20 - Prob. 6CQCh. 20 - Prob. 7CQCh. 20 - Prob. 8CQCh. 20 - Prob. 9CQCh. 20 - Prob. 10CQCh. 20 - Name the four stages of mitosis and describe what...Ch. 20 - Prob. 12CQCh. 20 - Prob. 13CQCh. 20 - At what phase of mitosis does the DNA become most...Ch. 20 - Prob. 15CQCh. 20 - Prob. 16CQCh. 20 - Local community blood programs are always seeking...Ch. 20 - Prob. 18CQCh. 20 - Prob. 19CQCh. 20 - Prob. 1PEACh. 20 - Prob. 2PEACh. 20 - Prob. 3PEACh. 20 - Prob. 4PEACh. 20 - Prob. 1PEBCh. 20 - Prob. 2PEBCh. 20 - Prob. 3PEBCh. 20 - Prob. 4PEB
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- The amount of oxygen used by the body in metabolism is proportional to the energy yield, with 1 liter of oxygen combining with foods to produce about 20,000 joules. If the oxygen consumed in one minute is 1.5L during vigorous exercise, what is the metabolic rate in watts (i.e., what is the average power during this minute)?arrow_forwardSuppose a person eats 2000 Kcal per day. Using the facts that 1 Kcal is approximately 4.2 Kj (a kilojoule is a unit of energy equal to 1000 joules) and 1 watt is one joule per second (a unit of power), about how many watts does a person use?arrow_forwardI have 72 lightbulbs in my house. 53 of these lightbulbs are 65 watt and the other 19 lightbulbs are 53 watt. I use the 65 watt lightbulbs an average of 10 hours a day and 53 watt an average of 12 hours a day. 1 kilowatt=1000 watts. Estimate the energy used during 1 year by all the lightbulbs in my home?arrow_forward
- A high jumper of mass 60kg consumes a meal of 3.00 x 10 ³ kcal prior to a jump. If 3.3% of the energy from the food could be converted to gravitational potential energy in a single jump, how high could the athlete jump?arrow_forwardYour brain consumes about 22 W of power, and avocados have been shown to promote brain health. If each avocado contains 310 C, and your brain were powered entirely by the energy from the avocados, how many must you eat each day?arrow_forwardAssuming that there are 5 × 1013 cells in the humanbody and that ATP is turning over at a rate of 109 ATPmolecules per minute in each cell, how many watts is thehuman body consuming? (A watt is a joule per second.)Assume that hydrolysis of ATP yields 50 kJ/mole.arrow_forward
- Water flows over a waterfall that is 20.0 m high at the rate of 4.0 x 104 kg/s. If this water powers an electric generator with a 40.0% efficiency, how many watts of electric power can be supplied? Give you answer in MW (1 megawatt = 1x10' W). 3,136,000arrow_forwardThe recommended daily caloric intake is 2000 calories (8,400,000J). This is because this is the same value for how much the average body loses to heat and work in a typical day (your change in energy is zero because you take in the same amount of energy you lose). A) If you lose a total of 8,400,000J (Qout+W=total lost), but consume 1200 calories of food (5,000,000J), what would your change in energy be? B) Assuming your change in energy is negative (hint-it should be), where does your body get the extra energy to maintain it's temperature?arrow_forwardA fuel tank contains 25 × 1010 BTUs of energy. The fuel is converted intoelectrical energy in the power station with an efficiency of 15%. The average of the demand at the station over a 24 hour period is 3.5 MW. In how many days the fuel will be consumed?arrow_forward
- Only about 20% of the Calories we consume are used for mechanical work (i.e., moving the body around). Estimate how many granola bars (150 Cal per bar) an 85 kg person will burn if they climb vertically up theside of the Empire State Building. height of Empire State Building, h = 443 m unit conversion: 1 Cal = 4184 Joulesarrow_forwardThe total consumption of electrical energy in the United States is about 1.0 1019 joules per year. What is the average rate of electrical energy consumption in watts? If the population of the United States is 300 million, what is the average rate of electrical energy consumption per person? The sun transfers energy to the earth by radiation at a rate of approximately 1.0 kW per square meter of surface. If this energy could be collected and converted to electrical energy with 40 % efficiency, how great an area (in square kilometers) would be required to collect the electrical energy used by the United States?arrow_forwardA microwave oven has a power requirement of 1,251 W. A frozen dinner requires 6.8 min to heat on full power. (a) How much electrical energy (in kWh) is used? kWh(b) If the cost of electricity is 14¢ per kWh, how much does it cost to heat the dinner? (Do not round your final answer. Fractional cent values are acceptable.)arrow_forward
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