Category: Physics

What is the power of white noise? White noise is a CT stochastic process whose PSD is constant. Signal power is the integral of PSD over all frequency space. Therefore the power of white noise is infinite. No real physical process may have infinite signal power. What is an example of white noise? White noise […]

Can yelling affect my unborn baby? A calm and stress-free pregnancy is best for all concerned but now a new study suggests that partners who yell at a pregnant woman could be doing lasting harm that goes beyond the mum-robe’s own mental well-being. How can I make my pregnant wife happy? 10 Things You Must […]

How do you know if a vessel is thin walled? Generally, a pressure vessel is considered to be “thin-walled” if its radius r is larger than 5 times its wall thickness t (r > 5 · t). What is the usual value of FOS for thin pressure vessel? Typical overall Factors of Safety Equipment Factor […]

What is an example of sustainable use? Renewable clean energy is probably the most obvious example of sustainability. Here are three examples. Solar energy: Once the sun’s electromagnetic radiation is captured, it produces electricity and heat. Wind Energy: Wind turbines convert the kinetic energy in the wind into mechanical power. Which is a sustainable practice? […]

What happens next depends on the mass of the star? About 75% of the mass of the star is ejected into space in the supernova. The fate of the left-over core depends on its mass. If the left-over core is about 1.4 to 5 times the mass of our Sun, it will collapse into a […]

Do mirrors enlarge things? Reflection from a Plane Mirror The image distance always equals the object distance. The size of the image is the same as the object (the mirror does not magnify the image). Does mirror make room look bigger? Use mirrors If you’ve ever wondered, “Do mirrors make a room look bigger?” the […]

¿Cómo era Juanito en el país sin punta? Juanito Pierdedía era un gran viajero. Viaja que te viaja, llegó una vez a un pueblo en que las esquinas de las casas eran redondas y los techos no terminaban en punta, sino en una suave curva. A lo largo de la calle corría un seto de […]

What is called instantaneous speed? Definition: When the speed of an object is constantly changing, the instantaneous speed is the speed of an object at a particular moment (instant) in time. What is the difference between velocity and speed? The reason is simple. Speed is the time rate at which an object is moving along […]

How many moles is 1 MgCl2 FM? 0.010502988100114 mole What is the mass of 1 mole of MgCl2? 95.211 g/mol How many atoms are in 5 moles of MgCl2? 5 moles of MgCl2 = 5.0×6.022*10²³ = 3.011*10²⁴ atoms or molecules. How many grams of aluminum are in a mole? 26.982 g How many grams are in […]

Why does the viscosity of liquids decrease with temperature? The increase in temperature causes the kinetic or thermal energy to increase and the molecules become more mobile. The attractive binding energy is reduced and therefore the viscosity is reduced. How does viscosity of liquids vary with temperature? The viscosity of liquids decreases rapidly with an […]