Why is a scale important on a graph? The distance between two numbers indicates a unit and this unit remains uniform throughout a scale. Thus, a scale plays a crucial part in plotting graphs. Without scales, we won’t be able to infer anything relevant from the graph. A scale on a graph can have any […]
Why does my balloon car not move?
Why does my balloon car not move? Some of the things that slow balloon cars down, that you have to overcome, are their own weight, air resistance, friction, and inefficient use of the air escaping the balloon. Which type of balloon would deflate the fastest? Helium balloons How much does it cost to fill 100 […]
Does phenolphthalein turn pink in acid or base?
Does phenolphthalein turn pink in acid or base? Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. It belongs to the class of dyes known as phthalein dyes. What is the pH range for the color change of phenolphthalein? Indicator […]
What is positive decision making?
What is positive decision making? Positive decision makes attempts to seek out all alternative outcomes and sets about achieving the best of those outcomes. Planning. Negative decision making, being based on the absence of negative consequences, has little opportunity for planning. What defines a good decision? A good decision is one that is made deliberately […]
What is the most probable reason why a life jacket helps you float in water?
What is the most probable reason why a life jacket helps you float in water? The trapped air weighs much less than the weight of the water it displaces, so the water pushes up harder than the life jacket pushes down, allowing the life jacket to remain buoyant and float. This buoyancy is strong enough […]
How do we know the nucleus is positive?
How do we know the nucleus is positive? Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. In Rutherford’s experiments most of the alpha particles passed straight through the foil without being deflected. Is a nucleus positive? […]
Is eating no meat healthy?
Is eating no meat healthy? The health factor And people who don’t eat meat — vegetarians — generally eat fewer calories and less fat, weigh less, and have a lower risk of heart disease than nonvegetarians do. Even reducing meat intake has a protective effect. Will I get sick if I eat meat after being […]
What are the 2 types of active transport?
What are the 2 types of active transport? Active transport requires cellular energy to achieve this movement. There are two types of active transport: primary active transport that uses adenosine triphosphate (ATP), and secondary active transport that uses an electrochemical gradient. Is facilitated diffusion an example of passive transport? Facilitated diffusion is a type of […]
What is the third ionization energy of a ground state Beryllium Be atom?
What is the third ionization energy of a ground state Beryllium Be atom? Beryllium atoms have 4 electrons and the shell structure is 2.2. The ground state electron configuration of ground state gaseous neutral beryllium is [He]….Ionisation Energies and electron affinity. Ionisation energy number Enthalpy / kJ mol‑1 3rd 14848.72 4th 21006.64 How do you […]
What does the atomic mass tell you?
What does the atomic mass tell you? The atomic mass tells us the weight of protons and neutrons. How do you know how many electrons there are surrounding the nucleus of a particular atom? Why isn’t the atomic mass always a whole number? Atomic mass is never an integer number for several reasons: The atomic […]