Category: Physics

What are two examples of concave lens? There are many examples of concave lenses in real-life applications. Binoculars and telescopes. Eye Glasses to correct nearsightedness. Cameras. Flashlights. Lasers (CD, DVD players for example). How do we use magnifying lens in our life? Light A magnifying glass (called a hand lens in laboratory contexts) is a […]

Can we sit on a cloud? Although we can’t really touch clouds you could walk through one. In fact that’s what fog is: a cloud that’s formed close to the ground instead of high in the sky. We can’t touch fog but we can move through it. Although it’s fun to imagine sitting on a […]

What if Earth had no tilt? The tilt of Earth’s axis is the main cause of the seasons. If Earth had no tilt, then the length of daylight and the intensity of solar heating seen by a person standing at a single place on the surface would be the same all year round. What if […]

What is the hardest glass? Toughened glass Is Cast Iron harder than glass? Also: cast iron can’t scratch glass. Glass is much harder than iron (see this wikipedia article), glass having a 6-7 on the Mohs scale, iron having a 4. Regarding (3) melting glass top: I have, unfortunately, successfully melted a glass top range […]

What swim goggles do Navy SEALs use? We like these simple goggles – the Aqua Sphere Goggle . These are easy to slip on and knock out a 2k swim in the pool with fins or to get out in the ocean and get some distance. The glasses will serve their primary purpose, to keep […]

What is an example of the Fifth Amendment? During a criminal trial, the Fifth Amendment pertains to more individuals than just the defendant. For example, a witness may refuse to testify if doing so would have him or her self-incriminate, even if the criminal conduct in question is not related to the actual case. Why […]

What is the main magnetic field? The Main Magnetic Field originates from a dynamo process in the fluid outer core of the Earth. It strongly dominates over the various other contributions to the geomagnetic field, accounting for over 95% of the field strength observed at the Earth’s surface. What is the strength of an MRI […]

What is the speed of the particle when it enters the magnetic field region? A proton enters a uniform magnetic field of 1.0 × 10 −4 T 1.0 × 10 −4 T with a speed of. 5 × 10 5 m/s . Why does a magnetic field do not work on a charged particle? One […]

What is the best solvent for carbon disulfide? Carbon disulfide is a colorless liquid, with an chloroform like smell when pure. Impure CS2 has a yellowish color and has a putrid smell. It is insoluble in water, but soluble in many organic solvents, such as benzene, ethanol, diethyl ether, carbon tetrachloride, chloroform. What is the […]

Which property could Huygens not prove? Because, while Huygens’ was correct, he could not demonstrate that light acted as a wave, while the double-slit experiment shows this very clearly. Since light has relatively short wavelengths, to show wave effects it must interact with something small — Young’s small, closely spaced slits worked. What is Hydance […]