Category: Physics

Can a penny dropped from a plane kill you? Is the velocity enough to kill someone? The myth is that when a penny is subjected to the force of gravity it will speed up as it falls, wounding any living thing in its path. The truth is, a falling penny won’t kill you, but a […]

How can I hide my router and modem? Routers, Modems, and Cable Boxes Consider a hollowed-out book, a file holder, or a decorative box if you’re going with the hide option. Surrounding a router or cable box with a stack of books, magazine, or other accents can help it blend in with your decor if […]

What is the importance of metastable state? In a three-level laser, the material is first excited to a short-lived high-energy state that spontaneously drops to a somewhat lower-energy state with an unusually long lifetime, called a metastable state. The metastable state is important because it traps and holds the excitation energy, building up a… What […]

Could I speak with or can I speak to? In both the cases, the meaning is “have a conversation with somebody.” The difference is that speak to (or talk to) is less polite, since it put the emphasis on one doing the conversation, while speak with (or talk with) is more polite, since it doesn’t […]

What causes air masses? An air mass forms whenever the atmosphere remains in contact with a large, relatively uniform land or sea surface for a time sufficiently long to acquire the temperature and moisture properties of that surface. The Earth’s major air masses originate in polar or subtropical latitudes. What is the air mass classification […]

What is nitrogen-15 made up of? Nitrogen-15 is a rare stable isotope of nitrogen. Two sources of nitrogen-15 are the positron emission of oxygen-15 and the beta decay of carbon-15. Nitrogen-15 presents one of the lowest thermal neutron capture cross sections of all isotopes. Nitrogen-15 is frequently used in NMR (Nitrogen-15 NMR spectroscopy). What does […]

Why does a spoon look bigger in a glass of water? The index of refraction for water is 1.33. This larger index of refraction for water means that the angle the rays of light reach your eyes is larger in water than the angle would be in the air. This increase in the angle size […]

What is percentile in normal distribution? A percentile is the value in a normal distribution that has a specified percentage of observations below it. Percentiles are often used in standardized tests like the GRE and in comparing height and weight of children to gauge their development relative to their peers. What is the formula of […]

Is a dead organism abiotic? Dead organisms are not abiotic. Some people think that if an organism is no longer alive, it cannot be considered biotic. Is a sun abiotic or biotic? Abiotic factors are non-living things that “live” in an ecosystem that affect both the ecosystem and its surroundings. Some examples of Abiotic factors […]

What helps you show differences across various categories between the two data? Answer. Answer: A scatter plot or scattergram chart will show the relationship between two different variables or it can reveal the distribution trends. What are the parts of storytelling with data? Data storytelling is a structured approach for communicating data insights, and it […]