Category: Physics

Which era is called the Age of Mammals? Cenozoic What is the oldest era? Paleozoic Era What do you call the present era? Currently, we’re in the Phanerozoic eon, Cenozoic era, Quaternary period, Holocene epoch and (as mentioned) the Meghalayan age. The Greenlandian, the oldest age of the Holocene (also known as the “lower Holocene”), […]

WHY BE is not noble gas? At the top of the noble gases is little helium (He), with a shell that is full with only two electrons. The fact that their outer shells are full means they are quite happy and don’t need to react with other elements. In fact, they rarely combine with other […]

What will happen if two hydrogen atoms combine? Thus, two Hydrogen atoms combine to form a Hydrogen molecule. The number of protons in the atomic nucleus is equal to the number of electrons revolving around that nucleus. This means that the positive electric charge is balanced by the negative. The atom is therefore electrically neutral. […]

What is the working distance for a 10x objective lens? Table 2 – Long Working Distance Objectives Designation Magnification Working Distance ELWD 100x 2.0 mm SLWD 10x 20.3 mm SLWD 20x 20.5 mm SLWD 50x 13.8 mm What happens if you try to use the coarse adjustment when the 10X lens? What happens if you […]

At what speed do airbags become ineffective? For unbelted occupants the effectiveness goes to zero or becomes negative above 40 kph (25 mph) for MAIS 3+, and for belted occupants the effectiveness stays positive but with significantly lower magnitude for speeds above 40 kph (25 mph). What if my airbags didn’t deploy? If your airbag […]

What are the five properties of alkalis? Chemical Properties of Alkalis Alkalis react with Acids to form salt and water. This reaction is called neutralisation reaction. Alkalis react with ammonium salts to form salt, water and ammonia gas. Alkalis react with solution of metal salt to form another metal salt and hydroxide. What are the […]

What is difference between preventive and periodic maintenance? The main difference between the two is that preventive maintenance is scheduled at regular intervals while predictive maintenance is scheduled as needed (based on asset conditions). These costs are often acceptable to organizations that have already successfully implemented a preventive maintenance program. What are the benefits of […]

How do you describe a theory? A theory is a well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts. A theory not only explains known facts; it also allows scientists to make predictions of what they should observe if a theory is true. Scientific theories are testable. How […]

What are the 5 factors of evolution? Five different forces have influenced human evolution: natural selection, random genetic drift, mutation, population mating structure, and culture. All evolutionary biologists agree on the first three of these forces, although there have been disputes at times about the relative importance of each force. What is the main cause […]

How do you add a total row to a query? Add a Total row Make sure that your query is open in Datasheet view. To do so, right-click the document tab for the query and click Datasheet View. On the Home tab, in the Records group, click Totals. In the Total row, click the cell […]