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 light Cannot cause skin cancer?
What light Cannot cause skin cancer? Most skin cancers are caused by exposure to ultraviolet (UV) light. When you don’t protect your skin, UV rays from sunlight or tanning beds can damage your skin’s DNA. When the DNA is altered, it can’t properly control skin cell growth, leading to cancer. Can UV LED lights cause […]
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 […]
Why does metal heat up fast?
Why does metal heat up fast? Why do metals conduct heat so well? The electrons in metal are delocalised electrons and are free moving electrons so when they gain energy (heat) they vibrate more quickly and can move around, this means that they can pass on the energy more quickly. Does glass or metal heat […]
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 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 […]
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 […]
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 […]
Who was the greatest hero of the Revolutionary War?
Who was the greatest hero of the Revolutionary War? George Washington Who led Revolutionary War? General George Washington Who helped in the American Revolution? Who helped the Americans in the revolution? A number of European countries assisted the American colonists. The primary allies were France, Spain, and the Netherlands with France giving the most support. […]
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 […]