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What is quantum number explain with example?
What is quantum number explain with example? A quantum number is a value that is used when describing the energy levels available to atoms and molecules. An electron in an atom or ion has four quantum numbers to describe its state and yield solutions to the Schrödinger wave equation for the hydrogen atom. ms or […]
How many billion years did it take for humans to appear on Earth?
How many billion years did it take for humans to appear on Earth? Recognizable humans emerged at most 2 million years ago, a vanishingly small period on the geological scale. The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era, after a geological crust started […]
Why is element 43 unstable?
Why is element 43 unstable? Technetium can only be produced artificially because most forms or isotopes of it (atoms of the same chemical element with different numbers of neutrons) have an excess of neutrons, making it very unstable. Why is technetium so weird? Technetium, with atomic number (denoted Z) 43, is the lowest-numbered element in […]
Why is liquid water important to life?
Why is liquid water important to life? Even organisms that live in very dry places need water to live. One reason that water is so important is because it’s a liquid. This means that it can move around the materials that are needed for chemical reactions. These reactions include the ability for cells to get […]
Como se puede medir la fuerza?
¿Cómo se puede medir la fuerza? La unidad de medida de fuerza es el newton que se representa con el símbolo: N, nombrada así en reconocimiento a Isaac Newton por su aportación a la física. El newton es una unidad derivada del SI que se define como la fuerza necesaria para proporcionar una aceleración de […]
How do you find the latent heat of a mixture?
What is the final velocity in free fall?
What is the final velocity in free fall? Near the surface of the Earth, an object in free fall in a vacuum will accelerate at approximately 9.8 m/s2, independent of its mass. With air resistance acting on an object that has been dropped, the object will eventually reach a terminal velocity, which is around 53 […]
Is it better to be under or over weight?
Is it better to be under or over weight? People who are clinically underweight face an even higher risk for dying than obese individuals, the study shows. Compared to normal-weight folks, the excessively thin have nearly twice the risk of death, researchers concluded after reviewing more than 50 prior studies. How can you tell if […]