Category: Physics

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 […]

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 […]

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. […]

How is stoichiometric coefficient calculated? Almost all stoichiometric problems can be solved in just four simple steps: Balance the equation. Convert units of a given substance to moles. Using the mole ratio, calculate the moles of substance yielded by the reaction. Convert moles of wanted substance to desired units. What is the stoichiometric coefficient? The […]

Can WD 40 spontaneously combust? If the oil will cure and harden, then it is a fire hazard. WD40 won’t spontaneously combust. At what temperature does gasoline vapor ignite? 536°F. Is it safe to pressurize gasoline? 100 PSI isn’t exactly a small amount of pressure and in itself is rather dangerous. If the container bursts […]

What can longitudinal waves not travel through? Longitudinal waves are like mechanical waves which need the medium to propagate. These waves cannot travel through a vacuum. That is, there is absolutely in a vacuum. If there are no substances, then there are no particles for the sound waves to vibrate, which means the sound waves […]

What are the 8 types of joints? Planar, hinge, pivot, condyloid, saddle, and ball-and-socket are all types of synovial joints. Is the wrist a gliding joint? Gliding joints occur between the surfaces of two flat bones that are held together by ligaments. Some of the bones in your wrists and ankles move by gliding against […]

What is the most difficult form of abuse to identify? Emotional abuse What happens if you ignore CPS? Q: Do parents have the right to refuse entry to an investigator? A: Yes. But refusing entry to CPS will not end the investigation. If CPS has information that a child may be in danger, they have […]

What unit is Q? Q Unit is a unit in the category of Energy. This unit is commonly used in the US unit system. Q Unit has a dimension of ML2T-2 where M is mass, L is length, and T is time. It can be converted to the corresponding standard SI unit J by multiplying […]

What are the 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). What is the property of convex lens? The convex lens is a lens that converges rays of light that convey parallel to […]