22. The rate of growth of a fish population is modelled by 60000e-0.6t (1 + 5e-0.6t) 2¹ where t is measured in years since 2020 and G is in kilograms per year. If the biomass was 25000 kg in the year 2020, what is the predicted biomass for the year 2040? E) None of the above. A) 41665.8 B) 4166 G(t) = C) 85000 D) 0

22. The rate of growth of a fish population is modelled by 60000e-0.6t (1 + 5e-0.6t) 2¹ where t is measured in years since 2020 and G is in kilograms per year. If the biomass was 25000 kg in the year 2020, what is the predicted biomass for the year 2040? E) None of the above. A) 41665.8 B) 4166 G(t) = C) 85000 D) 0

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Introduction

Section: Chapter Questions

Problem 31P: (a) About how many microorganisms are found in the human intestinal tract? (A typical bacterial...

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(a) About how many microorganisms are found in the human intestinal tract? (A typical bacterial length scale is one micron = 106 m. Estimate the intestinal volume and assume bacteria occupy one hundredth of it.) (b) Discuss your answer to part (a). Are these bacteria beneficial, dangerous, or neutral? What functions could they serve?
1. A) How much diesel fuel (gallons) is required to move a unit train (100 cars) with 125 tons of freight per car from Salt Lake City to Denver (517 mi)? b)The density of diesel fuel is 6.9 lb/gallon, how much CO2 is emitted by the train? type of fuel Carbon content Cf t-CO2/t-Fuel Diesel/Gas Oil 0.875 3.206000
2. How many U.S. gallons are there in a cubic mile? The total proven oil reserves of the U.S. areroughly 30 ×10^9 bbl. How many cubic miles is this?
When we use petrol we are ultimately using stored energy from the sun. Plants capture the energy when growing, and then through a long process of decay and compression this plant matter is converted into a fossil fuel. An interesting question is how much sunlight is needed to produce a quantity of petrol. To estimate this, let's assume the petrol has come from wood, and let's assume we have a fast-growing wood source such as Pinus radiata. Assume also: a mature tree contains around 3 m3 of timber; a tree is harvested when 35 years old; the density of wood is around 500 kg/m3; 2 kg of wood makes 1L of petrol; a tree receives on average 8 hours of sunlight per day. How many "hours of sunlight" are stored in 1L of petrol? i.e. how many hours of sunlight does a tree need to be exposed to, to produce the amount of wood needed to make 1 L of petrol? Give your answer to two significant figures.
#12. Why does it need to convert to kg? Is there a way to do this without converting?
The number of viruses (V , measured in trillions or 10¹²) that infect a person is a function of the degree of immunosuppression (I, the fraction of the immune system that is turned off by stress) according to V(I) = 5I². The fever (F, measured in ◦C) associated with an infection is a function of the number of viruses according to F(V) = 37 + 0.4V. Find fever as a function of immunosuppression. How high will the fever be if immunosuppression is complete (I = 1)?
Find an example on the internet that describes how equilibrium is notachieved in a population when factors (any factors) such as selectionstrength are included.
Explain population inversion.
The “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 percent
Identify two density dependent factors that could act as limiting factors for a population . Why are they density dependent.
7. PHYS101
A sample of a gold nugget was measured and ha a mass of 2.94 lbm. if the gold is drawn into a wire whose diameter is 3.73 x 10^ -3, how many inches of gold wire can be obtained from the nugget? The density of gold is 19.3 g/cm^3