Can steel be separated by physical means? Can it be separated by physical means? If the answer is no, the matter is a pure substance. What is the elements that Cannot be separated? An element cannot be separated into simpler substances by physical or chemical means. The periodic table organizes elements by their properties. Aggregates […]
What are the classification of measuring instruments?
What are the classification of measuring instruments? The measuring instruments may be classified as follows: Absolute instrument & Secondary instruments: Analog and Digital instrument: Mechanical, Electrical and Electronics Instruments: Deflection and Null Output Instruments: Self-operated and Power-operated Instruments: Why do we measure vibration? Vibration may influence the durability and reliability of machinery systems or structures […]
What is the main difference between the ideas of Galileo and Aristotle?
What is the main difference between the ideas of Galileo and Aristotle? Aristotle says that the heavier things are, the quicker they will fall, whereas Galileo felt that the mass of an object made no difference to the speed at which it fell. What is the idea of Galileo about motion? Galileo was correct in […]
What is the output of a flashlight?
What is the output of a flashlight? The light output of an incandescent lamp in a flashlight varies widely depending on the type of lamp. A miniature keychain lamp produces one or two lumens. A two D-cell flashlight using a common prefocus-style miniature lamp will produce on the order of 15 to 20 lumens of […]
Is heat added or removed in condensation?
Is heat added or removed in condensation? A substance condenses when the pressure exerted by its vapour exceeds the vapour pressure of the liquid or solid phase of the substance at the temperature of the surface where condensation occurs. Heat is released when a vapour condenses. What happens when a solid is heated Class 9? […]
What are the three means of exchange?
What are the three means of exchange? It consists of : 1) currency (coins, paper money), 2) checkable deposits, ( total of checking account balances in financial institutions convertible to currency “on demand” by writing a check without advance notice), and 3) traveler’s checks. This type of money is the most liquid. Which of the […]
What are sedentary activities?
What are sedentary activities? Examples of sedentary behaviour include: Sitting or lying down while watching television or playing electronic games. Sitting while driving a vehicle, or while travelling. Sitting or lying down to read, study, write, or work at a desk or computer. How do you know if you are sedentary? Unless you do at […]
What is the purpose of theory in research?
What is the purpose of theory in research? Theories are formulated to explain, predict, and understand phenomena and, in many cases, to challenge and extend existing knowledge within the limits of critical bounding assumptions. The theoretical framework is the structure that can hold or support a theory of a research study. Why do we need […]
Where are lipids found in food?
Where are lipids found in food? Introduction. In foods, lipids are mainly found in the form of triacylglycerols (triacylglycerides) (TAG), which make up to 99% of lipids of plant and animal origin (Fennema, 1996). Phospholipids (PL) are important structural lipids in foods and cell membranes. Where are lipids and oils found in a plant? Essential […]
Why can velocity be negative but speed can t?
Why can velocity be negative but speed can t? 2 Answers. Remember that velocity and acceleration are vectors, they have a magnitude and direction. Speed, on the other hand, is a scalar quantity which only has magnitude. So yes, the negative sign indicates a slowing down. What does it mean when position is negative? In […]