What prevents the wrong gas from being connected to the equipment? The connection is marked with a Compressed Gas Association (CGA) number and will be left-hand or right-hand threaded to match the nut or fitting. This prevents a piece of incompatible gas equipment from being connected to the wrong gas supply. Can gas cylinders explode? […]
What is the pH of NaCl?
What happens when water cools below 4?
What happens when water cools below 4? Right when the water freezes to ice, the ice becomes significantly less dense than the water and continues to float on the lake’s surface. Below 4° Celsius, water becomes less dense as it gets colder, causing water about to freeze to float to the top. What happens when […]
What is it called when you study stars?
What is it called when you study stars? What is Astronomy? Astronomy is the study of everything in the universe beyond Earth’s atmosphere. That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars . How do scientists study space today? Astronomers study the […]
Why there is a need for scientific knowledge in education?
Why there is a need for scientific knowledge in education? Problem-solving and critical thinking are two of the most important skills students learn in school. In this way, science is one of the most important subjects students study, because it gives them the critical thinking skills they need in every subject. What is the impact […]
How do you solve accuracy and precision?
How do you solve accuracy and precision? Find the difference (subtract) between the accepted value and the experimental value, then divide by the accepted value. To determine if a value is precise find the average of your data, then subtract each measurement from it. This gives you a table of deviations. Then average the deviations. […]
Do electrons know they being observed?
Do electrons know they being observed? This process is sometimes referred to as decoherence. We also see phrases such as “wavefunction collapse”. By virtue of such an interaction of a quantum system with a classical measurement device, one could quite misleadingly assert that the electron “knows” it is being observed. It doesn’t. Why do wave […]
What is the probability of drawing a blue marble from a bag of 18 marbles three of which are blue?
What is the probability of drawing a blue marble from a bag of 18 marbles three of which are blue? The probability is 3/18 which you can simplify down to 1/6. 🙂 Hope this helps! What is without replacement in probability? Probability without replacement means once we draw an item, then we do not replace […]
What was the first plane to break sound barrier?
What was the first plane to break sound barrier? Bell X-1 Did Spitfire break sound barrier? A Spitfire very nearly broke the sound barrier in 1944. In the 1930s a small number of aero-engineers recognized that the piston-engine and propeller were providing diminishing returns. For the aircraft to go supersonic the whole propeller would have […]
What are 3 organisms?
What are 3 organisms? Organisms are classified by taxonomy into groups such as multicellular animals, plants, and fungi; or unicellular microorganisms such as protists, bacteria, and archaea. What are the 8 organisms? There are different types of organisms, including -producers, consumers, herbivores, carnivores, omnivores, scavengers, parasites, predators, and decomposers. What type of organisms are humans? […]