Around 650 million years ago, the Earth was covered from pole to pole with glaciers during a period referred to as Snowball Earth. Identify and describe a set of 3 realistic global scale feedback mechanisms that address the following:

a. A feedback mechanism that allowed the Earth to descend into a global glaciation

b. A feedback mechanism that kept the Earth in a permanent glaciation for millions of years

c. A feedback mechanism that allowed the Earth to escape from the glacial period to the warm period that followed.

how are Americans responding to mass media news coverage of COVID-19 and the Coronavirus pandemic?

Reasons for understanding petroleum as being of biogenic origin.

Please explain the "BIG FIVE" greatest mass extinctions and the results.

Then answer the questions: "Are mass extinctions a thing of the past? Why or Why Not?"

A sample contains 80% of radioactive Carbon ¹³C. Calculate the age of the sample if you knew that the half time of Carbon isotope is 5730 year. Radioactive decay follows first-order reaction kinetics.

Absolute or 100% ethanol is produced from a mixture of 95% ethanol and 5% water using the Keyes distillation process. A third component, benzene, is added to lower the volatility of the alcohol. Under these conditions, the overhead product is a constat-boiling mixture of 18.5% ethanol, 7.4% water and 74.1% benzene. Use the following data to calculate the volume of benzene that should be fed to the still in order to produce 250 litres of absolute ethanol: density of 100% ethanol = .785g/cm3 and density of benzene = .872 g/cm^3

1. What are some lethal ranges for pH and what effect do they have on aquatic organisms?

2. Describe how the Hudson River salinity compares to other major rivers in the U.S. (use the ppt unit of measurement and the chart in your lab to help answer this question)

3. What are some factors that can contribute to the turbidity of water?

4. After a heavy rainfall, would you expect phosphate levels in the Hudson River to increase or decrease relative to after a period of dry weather? Why?

5. Explain the process of eutrophication, and how elevated phosphate levels can lead to low dissolved oxygen.

6. Why is it important to test two different sites for a river or a body of water?

7. Besides the dissolved oxygen, temperature, salinity, pH, and turbidity, what else could you investigate to see how healthy a river is.

Anaerobic fermentation is carried in a bioreactor where glucose (C6H12O6) is digested to form the
products ethanol (C2H5OH) and propenoic acid (C2H3CO2H). The product stream is analyzed and
found to contain 96.5 mole % water, 1.34 mole % C2H5OH, 0.79 mole % C2H3CO2H, 1.12 mole
% CO2 and 0.25 mole % C6H12O6. Given the specific gravity of ethanol is 0.789.
a. Calculate the mass fraction of each compound and the average molecular weight of the
product stream mixture.
b. Determine the total mass and molar flow rates of the product stream if the production rate
of ethanol is 160 L/day

Mass balance

1. From now until 2050, the human population is expected to grow bigger, more slowly, older, and more urban. Of these four factors, which do you think will have the biggest effect on the climate or environment?

2. In the U.S., more and more people are living alone in their own homes and buying their own cars instead of living with family or carpooling. How can materialism and capitalism impact climate or environment?

3. The author proposes three lines of action to reduce both poverty and global greenhouse gas emissions: universal secondary education, voluntary contraception, and maternal health services, and smarter urban design and construction. Of these three, which do you think will have the greatest impact and why? Alternatively, suggest a different line of action and explain why you chose that.

4. Demographic factors (household size, city size, population density), institutional and economic factors (availability of public transport at reasonable cost/convenience), and a host of behavioral factors (propensity to walk, bike, carpool, or drive solo to work) can influence a person’s carbon footprint. Think about your personal carbon footprint. What do you think is your number one contributing factor to CO₂emissions? What is one way that you think you could reasonably reduce your carbon footprint?

Adaptations for digesting foods high in fiber, protein, and structural carbohydrates include _____.

a- gut fermentation

b- opposable thumbs

c- teeth designed for shredding

d- gut fermentation and teeth designed for shredding

e- all of the adaptations listed here

The Racing Extinction Documentary discusses the 6th Extinction. What is mass extinction? How many have occurred in the past? What is the 6th Extinction and how does it compare to previous extinctions? What are you doing to drive the 6th Extinction? What could you do to stop it?

An orifice meter is used to measure flow rate of liquid in pipe shows a pressure difference of ' x ' m of water column when the flow rate is Q If flow rate is doubled then what is delta P?

A Rankine power cycle with reheat uses water as the working fluid. The inlet conditions of the
first stage turbine are 14MPa and 600oC. All the turbines are known to have isentropic
efficiency of 85%, however the pump is assumed as an isentropic pump. If the maximum
temperature is kept at 600oC and the condenser pressure is 6 kPa, by constructing a suitable
plot, show that having more than 2 reheat stages is not practical. (Hint: Take at least three
reheat pressures between 2 to 12 MPa)
Note: You may construct the plot on Microsoft Excel or manually on a graph paper. However,
all the calculations involved must be performed manually, in details and must be shown clearly.

Explain how diversity issues such as race, gender, age, religious affiliation and culture impact the client population (human trafficking)

Please, I want a paragraph about PLA materiel, with a table of properties of PLA.

I need it in an experimental measurement and techniques project. NO PLAGIARISM PLEASE