What are the major causes of freshwater pollution? Pollution may be caused by fecal waste, chemicals, pesticides, petroleum, sediment, or even heated discharges. Polluted rivers and lakes are unfit for swimming or fishing; polluted water is unsafe to drink. How does water use impact the environment? Less Water Affects the Environment When reservoir water levels […]
Is oxygen a donor or acceptor?
Is oxygen a donor or acceptor? Oxygen is an oxidizing agent (electron acceptor) and hydrogen is a reducing agent (electron donor). What are the best electron donors? When a really good donor meets a great acceptor, the chemical reaction releases a lot of energy. Oxygen (O2) is the best electron acceptor and is used in […]
Is freezing point depression positive or negative?
Is freezing point depression positive or negative? The change in the freezing point is proportional to the amount of solute added. This phenomenon is called freezing point depression. The change in the freezing point is defined as: ∆Tf = Tf,solution − Tf,solvent. ∆Tf is negative because the temperature of the solution is lower than that […]
Is it more energy efficient to boil water?
Is it more energy efficient to boil water? An electric stove requires more energy and time to heat up, thus it takes longer to heat the water inside the kettle. However, an electric stove is more efficient in delivering energy to the kettle. Using boiling water and vinegar removes mineral deposits that reduce its energy […]
Why is light important for humans?
Why is light important for humans? Earth has been bathed with light from the Sun ever since; it is our most important source of energy. Sunlight warms us, causes weather patterns, allows plants to manufacture oxygen and our food from carbon dioxide and water, and it allows us to find our way around in the […]
Which WiFi frequency is best?
Which WiFi frequency is best? Ideally, you should use the 2.4GHz band to connect devices for low bandwidth activities like browsing the Internet. On the other hand, 5GHz is the best suited for high-bandwidth devices or activities like gaming and streaming HDTV. What is the advantage of having WiFi in your car? Benefits of car […]
What is one example of why researchers must take into consideration?
What is one example of why researchers must take into consideration? What is one example of why researchers must take into consideration the benefits of their research? A study should only be conducted if the study’s benefits outweigh the risks. What is one reason why scientific psychologists follow a specific set of guidelines to help […]
Are roller coasters safe for the brain?
Are roller coasters safe for the brain? The risk of traumatic brain injury (TBI) while riding roller coasters has received substantial attention. Case reports of TBI around the time of riding roller coasters have led many medical professionals to assert that the high gravitational forces (G-forces) induced by roller coasters pose a significant TBI risk. […]
What is DNA as genetic material?
What is DNA as genetic material? DNA, deoxyribonucleic acid, is the genetic material in your cells. It was passed on to you from your parents and determines your characteristics. Where is genetic material found? The genetic material of a cell or an organism refers to those materials found in the nucleus, mitochondria and cytoplasm, which […]
What Colour would green be in red light?
What Colour would green be in red light? There are three primary colours in light: red, green and blue….Coloured light. Appearance of object in red light White paper Red (only red light to reflect) Red apple Red Green apple Black (no green light to reflect) Why do red and green light make yellow? A mixture […]