Category: Physics

How do the founder effect and bottlenecking differ? Bottlenecks and founder effects. Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a population’s size is reduced for at least one generation. A founder effect occurs when a new colony is started by a few members of the original […]

How do astronomers identify stars? Thus, astronomers can identify what kinds of stuff are in stars from the lines they find in the star’s spectrum. This type of study is called spectroscopy. The science of spectroscopy is quite sophisticated. Why do stars wobble? We all know that the chains of gravity shackle a planet to […]

Can humans see light speed? Yes. We can see the objects moving at speed of light. But we do not have that technology yet and we do not know if anything with mass can travel at speed of light. One can see objects if photons can reach his eyes even if he is travelling at […]

Is water displacement dependent on mass? The concept of Archimedes’ principle is that an object immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the object. The mass of the displaced fluid can be expressed in terms of the density and its volume, m = […]

Which layer is closest to space? Layers of Earth’s Atmosphere exosphere—contains few particles that move into and from space. exobase—the lower boundary of the exosphere. thermosphere—temperature increases with height. The International Space Station orbits Earth in this layer. mesopause—the boundary between the mesosphere and the thermosphere; the coldest place on Earth. What layer are satellites? […]

What are the 3 schools of psychology? The following are some of the major schools of thought that have influenced our knowledge and understanding of psychology: Structuralism and Functionalism: Early Schools of Thought. Gestalt Psychology. The Behaviorist School of Thought in Psychology. The Psychoanalytic School of Thought. The Humanistic School of Thought. What are the […]

What are 5 facts about the Ring of Fire? 7 Hot Facts About the Pacific Ring of Fire It’s an International Sensation. Plate Tectonics Make the Whole Thing Possible. It’s Home to World’s Deepest Ocean Trench. It’s Littered With Volcanoes and Prone to Earthquakes. Its Quakes Aren’t Always Interconnected. It’s a Great Producer of Geothermal […]

How is wind speed indicated what is the unit used to define wind speed? How is Wind Speed and Direction measured? Wind speed is typically reported in miles per hour, knots, or meters per second. One mile per hour is equal to 0.45 meters per second, and 0.87 knots. Wind direction is typically reported in […]

What is a magnetic field how can the direction? the magnetic fields are the imaginary line which moves from south to north. this lines do not overlap each other. we can find the direction of the magnetic field lines by keeping a compass near to it. Why do 2 magnets repel or attract each other? […]

Why is o not stable? One oxygen atom is unstable since it has only 6 electrons in the outermost shell. For an atom to be stable it needs 8 electrons. So, for the oxygen atom to be stable it requires two more electrons in the valence shell. Why does O2 exist but not S2? In […]