Category: Physics

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 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 […]

How does a person move forward during swimming? A person applies force on the water in backward direction and water according to the third law of motion water apply an equal and opposite force in the forward direction which helps a person to swim. How do swimmers reduce drag? Here are ten good ways to […]

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 is current constant in a parallel circuit? Each resistor in parallel has the same voltage of the source applied to it (voltage is constant in a parallel circuit). Parallel resistors do not each get the total current; they divide it (current is dependent on the value of each resistor and the number of total […]

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 […]

Which hemisphere is the warmest? Northern Hemisphere Is it weird living in the southern hemisphere? The Southern hemisphere is mostly ocean. There is just less land to live on. In addition, the only continents, or large land masses, Australia and Antarctica, that are situated entirely IN the Southern hemisphere, as opposed to crossing into it […]

Is Life of Brian funny? Certainly “Monty Python’s Life of Brian” is funny, in that peculiar British way where jokes are told sideways, with the obvious point and then the delayed zinger. The tragedy of Brian (Graham Chapman) is that he has everything it takes be a success, except divinity. How does Life of Brian […]

How do you calculate the no load speed of a DC motor? By multiplying the velocity constant by the nominal motor voltage, obtain the theoretical no-load speed of the motor (zero torque and no-load speed) and plot it on the left vertical axis. Draw a straight line between this point and the stall torque and […]