Category: Physics

How does international trade affect the environment? The report Environmental Effects of International Trade considers whether globalisation has damaged environmen- tal goals. The evidence does suggest that trade and growth can exacerbate other measures of environmental degradation, however, particu- larly CO2 emissions (carbon dioxide). How does trade help the environment? For exporters, additional market access […]

What are 3 interesting facts about Hurricane Katrina? Hurricane Katrina Facts 01Hurricane Katrina was a Category 5 Atlantic hurricane. 02The highest wind speed achieved was 280 kilometers per hour. 03Hurricane Katrina started to form on August 23, 2005. 04It dissipated on August 31, 2005. 05Hurricane Katrina was one of the most deadly hurricanes with over […]

What is the chemical formula of carbon dioxide? CO2 What are three physical properties of carbon dioxide? Carbon dioxide appears as a colorless odorless gas at atmospheric temperatures and pressures. Relatively nontoxic and noncombustible. Heavier than air and may asphyxiate by the displacement of air. Soluble in water. Is carbon dioxide important for life? Carbon […]

What does it mean when you hear a knocking sound from your car? Engine knock is what happens when a portion of the fuel inside the cylinder detonates before the rest of the fuel. If the octane rating of the fuel you’ve used is too low, or there’s other damage elsewhere in the engine, some […]

How early did humans make fire? 1.5 million years ago How was meat eaten before fire? The first evidence of controlled use of fire is from about 2 million years ago, so we’ve probably been cooking meat for a long, long time. Before that, our ancestors ate the meat they could get raw, like all […]

What are 2 examples of convergent evolution? An example of convergent evolution is the similar nature of the flight/wings of insects, birds, pterosaurs, and bats. All four serve the same function and are similar in structure, but each evolved independently. Some aspects of the lens of eyes also evolved independently in various animals. What are […]

How are humans affected by the biogeochemical cycles? Human activities have greatly increased carbon dioxide levels in the atmosphere and nitrogen levels in the biosphere. Altered biogeochemical cycles combined with climate change increase the vulnerability of biodiversity, food security, human health, and water quality to a changing climate. What is an example of cycling matter? […]

What are 3 disadvantages of wind energy? Various Disadvantages of Wind Energy The wind is inconsistent. Wind turbines involve high upfront capital investment. Wind turbines have a visual impact. May reduce the local bird population. Wind turbines are prone to noise disturbances. Installation can take up a significant portion of land. Wind turbines can be […]

Is the NFPA 704 symbol required? A: The NFPA 704 standard is a voluntary standard. NFPA 704 signs are required when another federal, state or local regulation or code requires their use. Some of the more widely adopted and used NFPA codes that require 704 signs for specific occupancies, storage and hazardous materials include: NFPA […]

Does diffraction affect frequency? None of the properties of a wave are changed by diffraction. The wavelength, frequency, period and speed are the same before and after diffraction. The only change is the direction in which the wave is travelling. What are the three common sources of interference? The two most common causes of interference […]