Category: Physics

Why did the Hindenburg not use helium? U.S. law prevented the Hindenburg from using helium instead of hydrogen, which is flammable. After the crash of the hydrogen-filled R101, in which most of the crew died in the subsequent fire rather than the impact itself, Hindenburg designer Hugo Eckener sought to use helium, a non-flammable lifting […]

How dangerous is spearfishing? With Spearfishing you may encounter a variety of dangers including Sharks, shallow water blackout, heavy seas, strong currents, Jelly Fish, and risk drowning as a result fo line tangles. Spearfishing by its very nature is an extreme sport and few activities can rival the excitement and thrill of landing a quality […]

What is the electromagnetic spectrum used for? Nearly all frequencies and wavelengths of electromagnetic radiation can be used for spectroscopy. Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays are all types of electromagnetic radiation. Which color is the most refracted? violet light What is required for refraction? For refraction to occur […]

At what BMI do you die? In males, a BMI of around 13 appears to be fatal. The coefficient of variation (CV) of the BMI is 8.7%. In contrast, females survive to a lower BMI of around 11, although with greater index variability (CV 14%). Several females had BMI’s as low as 9 and 10. […]

Should I put a sofa in front of patio doors? As a general rule, you don’t want to place a sofa in front of a door because you don’t want to block it, and you don’t want people to walk into the back of the sofa. However, if there is enough space and the back […]

What are 3 major events of the Protestant Reformation? 1517: Luther takes the pope to task 1517: Luther takes the pope to task. 1519: Reformist zeal sweeps the south. 1520: Rome flexes its muscles. 1521: Luther stands firm at Worms. 1525: Rebels are butchered in their thousands. 1530: Protestants fight among themselves. 1536: Calvin strikes […]

Why do bubbles form in boiling water? Boiling begins near the source of heat. When the pan bottom becomes hot enough, H2O molecules begin to break their bonds to their fellow molecules, turning from sloshy liquid to wispy gas. The result: hot pockets of water vapor, the long-awaited, boiling-up bubbles. Why does lower air pressure […]

What are the physical properties and uses of sulfur? Pure sulfur is a tasteless, odourless, brittle solid that is pale yellow in colour, a poor conductor of electricity, and insoluble in water. It reacts with all metals except gold and platinum, forming sulfides; it also forms compounds with several nonmetallic elements. What are the 3 […]

What are the four methods for treating hazardous waste? Although there are recycling and reduction methods available, there will almost always be some waste leftover that will need to be treated or stored. The four main methods for treating hazardous waste include treatment, surface storage, landfill storage, and deep-well injection. What are the 4 types […]

What would happen if the Hoover Dam collapsed? If catastrophe struck the Hoover Dam and it somehow broke, a catastrophic amount of water from Lake Mead would be released. That water would likely cover an area of 10 million acres (4 million hectares) 1 foot (30 centimeters) deep. Approximately 25 million people depend on water […]