Is speed always equal to velocity? Common mistakes and misconceptions. Average speed does not have to equal the magnitude of the average velocity. People may think that average speed and average velocity are just different names for the same quantity, but average speed depends on distance and average velocity depends on displacement. Does speed mean […]
What occurs during flashover?
What occurs during flashover? Flashover occurs when the majority of the exposed surfaces in a space are heated to their autoignition temperature and emit flammable gases (see also flash point). When the temperatures of the evolved gases become high enough, these gases will ignite, throughout their extent. Can you survive a flashover? Flashover is deadly […]
Could a volcano destroy the world?
Could a volcano destroy the world? Roughly every 100,000 years, there’s a supervolcano explosion somewhere in the world, the consequences of which can be fatal. If the volcano below Yellowstone National Park were to erupt, it would result in worldwide hunger and a volcanic winter (the cooling of the lower atmosphere). Can you survive a […]
What did Socrates mean when he said Know thyself?
What did Socrates mean when he said Know thyself? The Socratic Interpretation According to Socrates, true wisdom is knowing what you do not know. So an essential part of knowing yourself must be recognizing the limits of your own wisdom and understanding—knowing what you do genuinely know and knowing what you have yet to learn. […]
What are the advantages of SI unit?
What are the advantages of SI unit? (i) SI is coherent system of units, i.e., a system based on certain set of fundamental units. (ii) SI is rational system of units. i.e., it assigns only one unit to a particular physical quantity. (iii) SI is metric system, i.e., multiples and sub-multiples of the system can […]
What is the speed of a car that travels 700 km in 3 hours and 30 minutes?
Why can a horse not pull a cart and run in empty space?
What are the three main characteristics of sound?
What are the three main characteristics of sound? The basic properties of sound are: pitch, loudness and tone. Figure 10.2: Pitch and loudness of sound. Sound B has a lower pitch (lower frequency) than Sound A and is softer (smaller amplitude) than Sound C. What is nature of sound waves? introduction. Sound is a longitudinal, […]
What made the 5 Good Emperors good?
What made the 5 Good Emperors good? Nerva’s reign began the Nervan-Antonine Dynasty, which included what history calls the Five Good Emperors. In order of their reign, they were Nerva, Trajan, Hadrian, Antoninus Pius, and Marcus Aurelius. First, the Five Good Emperors brought relative peace, stability, and prosperity to Rome. Who is the best emperor […]