What is the biggest challenge facing farmers over the next decade? The following five challenges to the future of agriculture and food security exist on almost every continent in one form or another: constraints on resources from fossil fuel to water to phosphorus; land management problems resulting from tillage to monoculture to improper grazing practices; […]
What is the Lewis symbol for chlorine?
What is the Lewis symbol for chlorine? 5.3: Lewis Diagrams Element Atomic Weight Chlorine Compounds Phosphorus 30.97 PCl3, PCl5, P2Cl4 Sulfur 32.06 S2Cl2, SCl2, SCl4 Chlorine 35.45 Cl2 Potassium 39.10 KCl What is the Lewis dot structure for magnesium? Magnesium is element #12. To draw the Lewis electron dot diagram we picture in our minds […]
What are the major issues facing American federalism today?
What are the major issues facing American federalism today? What issues most influence American Federalism today? Today political debates over how the United States will best address key policy areas – poverty, homeland security, environmental protection, immigration, and health care – drive changes in our federal system. How has the power of federal government developed […]
Is it healthy to live in the city?
Is it healthy to live in the city? The detrimental effects of urban living on physical health have long been recognised, including higher rates of cardiovascular and respiratory disease. More recent, however, is the revelation that urban living can also have adverse effects on mental health. What is the most densely populated place on Earth? […]
Is a screwball a real pitch?
Why do O and B type stars have weaker hydrogen absorption lines?
Why do O and B type stars have weaker hydrogen absorption lines? So, most of the electrons in hydrogen are stuck on the ground orbit because they cannot absorb the lower energy light. This results in weaker absorption lines, because very few hydrogen atoms are participating. You cannot measure the temperature of the star based […]
How can I not believe in astrology?
How can I not believe in astrology? Realize that horoscopes are just for fun and do not mean anything. Check your horoscope (hopefully for the last time). Look at what your horoscope says. Then look at a different sign’s horoscope. If you find yourself thinking that you need to change to fit a horoscope, you […]
How do ocean surface currents affect climate?
How do ocean surface currents affect climate? Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth’s surface. How […]
What are the similarities and differences between electrolytic and voltaic cells?
What are the similarities and differences between electrolytic and voltaic cells? In both voltaic and electrolytic cells, oxidation occurs at the anode, while reduction occurs at the cathode. Thus, both these cells exhibit redox reactions. In both these cells, electrons flow from the anode to the cathode through the externally connected conductor. What is the […]
What can we learn from radial velocity?
What can we learn from radial velocity? The radial velocity technique is able to detect planets around low-mass stars, such as M-type (red dwarf) stars. This is due to the fact that low mass stars are more affected by the gravitational tug of planets and because such stars generally rotate more slowly (leading to more […]