Category: Physics

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 […]

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 […]

Why uniform circular motion is not SHM? Circular motion is not a form of simple harmonic motion. SHM occurs when a particle is subjected to a force that is anti-parallel to the particle’s motion. Thus, they are very different in nature. What is epoch in SHM? An epoch, in physics, refers to the displacement acquired […]

Is it good to Flex? It can also be a way to build strength. Muscle flexing is more accurately known as muscle contraction, because when you flex your muscles, you’re creating tension that’s temporarily making the muscle fibers smaller or contracted. This tension is one example of how flexing your muscles can help make them […]

What are disadvantages of DC? Disadvantages of DC Transmission: Due to commutation problem, electric power can’t be produced at High (DC) Voltage. In High Voltage transmission, we cant step-up the level of DC Voltage (As Transformer won’t work on DC). There is a limitation of DC switches and circuit breakers (and they are costly too). […]

Can you boil water with a tealight candle? This calculation suggests that a tea light should be able to boil 4 or 5 pots of water. However, not all the energy will go nto the hot water and you will have to heat up the pot as well as the water. So I would guess […]

Can you touch your eardrum? And if you press on those, it sends shock waves into the inner ear, and the inner ear is responsible for hearing and balance. So if you tap on the eardrum, you’re sending shock waves into the inner ear and you can cause problems with your hearing and balance. Is […]

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 […]

What is the most heat conductive liquid? Water Why is heat transfer important for thermal fluid design? The key point behind heat transfer fluid technology is the ability to generate high temperatures at low system pressures. Heat transfer fluid technology offers safety, low maintenance, and extending operating lifetimes when compared to traditional technologies such as […]

Which type of reaction releases energy quizlet? Chemical reactions that release energy, usually in the form of heat, are called exothermic reactions. Chemical reactions that absorb energy, usually in the form of heat, are called endothermic reactions. Many types of reactions can be endothermic or exothermic. How is energy released in a chemical reaction quizlet? […]