Who pollutes the most in the world? China Is Lamb worse than beef for the environment? This blog post draws on data and research discussed in our entry on Environmental impacts of food production and CO2 and Greenhouse Gas Emissions. Beef and lamb, in particular, have much higher greenhouse gas emissions than chicken,pork, or plant-based […]
How can you reduce unwanted energy transfers in a machine with moving touching components?
How can you reduce unwanted energy transfers in a machine with moving touching components? Mechanical devices can be made more efficient through lubrication to reduce the friction between moving parts of a machine and increase the amount of useful energy transferred. Can you put too much insulation in your attic? It is possible to over-insulate […]
What are the similarities and differences between kinetic and potential energy?
What are the similarities and differences between kinetic and potential energy? KE is the energy possessed by an object by virtue of it being in motion. PE is the energy possessed by an object by virtue of its position. It can be transferred from one object to another and this happens during collisions. Potential Energy, […]
What is the actual weight of molecule of water?
What is the actual weight of molecule of water? Therefore, 18g of mass of water is occupied by 6.022×1023 number of molecules. Therefore, we can calculate the mass of one molecule of water by dividing the mass of one mole of water and Avogadro number. The actual weight of a molecule of water is calculated […]
Do cameras reflect or refract light?
Do cameras reflect or refract light? Yes, cameras refract light. The refraction of light happens as it travels through the lens of the camera and creates a larger or smaller picture…. How do mirrors and lenses affect the path of light rays? Summary: How do lenses and mirrors affect light? Plane mirrors and convex mirrors […]
Do projectiles have a predictable path?
Do projectiles have a predictable path? Projectiles do not follow a predictable path. Where will the ball have the smallest speed? The speed is smallest at the highest point of its flight path because the y- component of the velocity is zero. At what point of the projectile path the speed is i minimum and […]
What did Pythagoras believe about the earth?
What did Pythagoras believe about the earth? An astronomical system positing that the Earth, Moon, Sun and planets revolve around an unseen “Central Fire” was developed in the 5th century BC and has been attributed to the Pythagorean philosopher Philolaus. Did Pythagoras go crazy? One of Pythagoras’ strangest obsessions with food was his relationship to […]
How many degrees is a 6% grade?
How do you figure out how much a trip will cost?
What is the difference between emission and absorption spectrum?
What is the difference between emission and absorption spectrum? The main difference between emission and absorption spectra is that an emission spectrum has different coloured lines in the spectrum, whereas an absorption spectrum has dark-coloured lines in the spectrum. What is basic emission? Definition of Emission The basic electronic emission occurs when heat, sunlight, electron […]