Are satellites outside the atmosphere? Satellites are sent into space by a rocket launched from the ground with enough energy (at least 25,039 mph!) to get outside our atmosphere. Satellites do carry their own fuel supply, but unlike how a car uses gas, it is not needed to maintain speed for orbit. Which layer of […]
What is the meaning of significant digit?
What is the charge of a basic oxygen furnace?
What is a polymeric material?
What is a polymeric material? Image credit: Maksim) Polymers are materials made of long, repeating chains of molecules. The materials have unique properties, depending on the type of molecules being bonded and how they are bonded. Some polymers bend and stretch, like rubber and polyester. Others are hard and tough, like epoxies and glass. What […]
What is SI unit of Hertz?
What is SI unit of Hertz? The symbol of the hertz in SI is Hz. The hertz is named for Heinrich Hertz (1857 – 1894), an early pioneer in electromagnetic research and the first person to demonstrate the transmission of electromagnetic waves through space. The hertz is a derived unit in the SI, equal to […]
What is the quietest thing in the world?
What is the quietest thing in the world? According to the Guinness Book of Records, the anechoic chamber at Orfield Laboratories in Minneapolis is the quietest place in the world, with a background noise reading of –9.4 decibels. If you chatted with someone, your speech would measure around 60 decibels on a sound-level meter. Where […]
What is SFX and VFX?
What is SFX and VFX? Special Effects (often abbreviated to SFX) refers to on-set visual effects techniques; you could also call them ‘practical effects’. VFX is an abbreviation of Video Effects. Video Effects enabled filmmakers to achieve the same effects as on-set SFX during post-production. What movie has the best special effects? Special effects in […]
Are action and reaction forces equal?
Are action and reaction forces equal? Formally stated, Newton’s third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the […]