Category: Physics

Does sublimation lose or gain energy? Some substances can change from the solid state to the gas state without ever becoming a liquid. During this process, known as sublimation, the sur- face particles of the solid gain enough energy to become a gas. One example of a substance that undergoes sublimation is dry ice. What […]

Is Eon a unit of Time? Eon goes back to the Greek aiōn, “age.” An age is not easy to measure, and neither is an eon. Both are just really long periods of time, but in science an eon is about a billion years. What is more than a millennia? Once beyond millennia we use […]

What are the 5 components of experimental design? The five components of the scientific method are: observations, questions, hypothesis, methods and results. Following the scientific method procedure not only ensures that the experiment can be repeated by other researchers, but also that the results garnered can be accepted. What are the 4 properties of a […]

What is the distance between 2 points called? The shortest distance between two points is the length of a so-called geodesic between the points. In the case of the sphere, the geodesic is a segment of a great circle containing the two points. Which is the shortest distance between two points in a particular? If […]

What is the toughest degree in the world? Toughest Courses in the World Explained Engineering. Considered one of the toughest courses in the world, engineering students are required to have tactical skills, analytical skills, critical thinking, and problem-solving abilities. Chartered Accountancy. Medicine. Pharmacy. Architecture. Law. Psychology. Aeronautics. Which is the toughest profession? Let’s take a […]

Is fruit turning brown a chemical or physical change? Fresh cut apples turn brown when iron-containing chemicals inside apple cells react with oxygen in the air. The chemical reaction is called “oxidation”, and the enzyme that regulates oxidation in apples is called “polyphenol oxidase” (PPO), also known as “tyrosinase”. What does the discoloration of Apple […]

Why is my AC making a crackling noise? If you hear a crackling noise, it’s possible that debris, like items made of paper and plastic, have been sucked into the unit and wrapped around the fan component, causing this odd sound every time the fan turns on. The debris needs to be cleaned out to […]

What is made up of horizontal rows and vertical columns? In the Mendeleev periodic table, the vertical columns are called groups and the horizontal rows are called periods. What are the horizontal sections of a table called? The periodic table is a tabular arrangement of elements in groups and periods that illustrates regular trends in […]

What is the difference between linear and angular kinematics? What is kinematics? – linear motion is when all parts of the object experience equivalent displacement. Angular motion is when all parts do not experience the same displacement. What are the 5 angular kinematic variables? People forget that all the rotational kinematic variables — θ 0 […]

Is Salt a physical or chemical change? Why Dissolving Salt Is a Chemical Change Therefore, dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion). Thus, any ionic compound that is soluble in water would experience a chemical change. Which reagent […]