Category: Physics

What happens to the orientation of the E in the field of view? Remove the slide and view the letter “e” with the naked eye. Compare the orientation of the letter “e” as viewed through the microscope with the letter “e” viewed with the naked eye on the slide. This demonstrates that in addition to […]

How can you tell if its a satellite? Watch the sky closely in the dawn or dusk hours, and you’ll likely see a moving “star” or two sliding by. These are satellites, or “artificial moons” placed in low Earth orbit. These shine via reflected sunlight as they pass hundreds of kilometres overhead. Can I see […]

Why is phone restricted? When you see “Restricted” appear on your caller ID, you are receiving a phone call from a restricted or blocked number. This is used when an individual does not want the person whom he or she is calling to be able to trace the call back to him or her. Should […]

How do neutron guns work? A modulated neutron initiator is a neutron source capable of producing a burst of neutrons on activation. It is a crucial part of some nuclear weapons, as its role is to “kick-start” the chain reaction at the optimal moment when the configuration is prompt critical. It is also known as […]

How do you calculate orbital radius? Kepler’s Third law can be used to determine the orbital radius of the planet if the mass of the orbiting star is known (R3=T2−Mstar/Msun, the radius is in AU and the period is in earth years). What is the orbital radius of the moon? Radius of the moon: 1.7 […]

What element has an oxidation number of 1+? hydrogen What is the oxidation number of Na? +1 What is the oxidation number for NO3? In the NO3- ion, each oxygen is assigned an oxidation state of -2. Since N-6 = -1, the oxidation state of nitrogen in NO3- will be +5. What is the difference […]

Which bond is stronger ionic or covalent or hydrogen? Ionic and covalent bonds are both definitely stronger than hydrogen bonds, and usually, ionic bonds are stronger than covalent bonds. Are ionic bonds stronger than hydrogen? Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; […]

What is the single most important thing in a golf swing? Use the big muscles of your legs and trunk to move the little muscles of your arms and hands. So watch the players at impact – they are all the same – and that is the most important part of any golf swing. Can […]

Who named the electron? G. Johnstone Stoney How did they discover the electron? In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. In addition, he also studied positively charged particles in neon gas. What did E Goldstein discover? Eugen Goldstein […]

What brightness and contrast settings is best for eyes? Most people are comfortable with the contrast set around 60 to 70 percent. Once you have your contrast where you like it, you can move on to the brightness setting. The goal here is to get the light coming out of your monitor similar to the […]