How damaging is a sonic boom? Damage due to a sonic boom is possible in light building components which have a large surface and consist of a material with a low tensile strength. Damage is very rare at overpressures up to about 500 N/m* and can only occur at points at which there were earlier […]
Is Can you please a question?
Is Can you please a question? Senior Member. “Can” and “could” are both equally polite – the key word is “please”, which is present in both sentences. The sentence beginning with “please can…” is a question, and it should have a question mark. It is a mistake/omission by the writer. Could you please help me […]
What are the methods of investigation?
What are the methods of investigation? Scientists use different methods of investigation in different circumstances. These methods include (in no particular order) fair testing, identifying and classifying, modelling, pattern seeking, and researching. What do descriptive and comparative investigations have in common? Descriptive Investigation: Involve describing and/or quantifying parts of a natural system. Example – observing […]
What is the cheapest oil has ever been?
How does convection affect the inside of the earth?
How does convection affect the inside of the earth? Inside Earth, the convection of mantle material is thought to cause the movement of the overriding crustal plates, resulting in events such as earthquakes and volcanic eruptions. Where is the Moho interface? The Moho lies almost entirely within the lithosphere. Only beneath mid-ocean ridges does it […]
Can coaches challenge Penalties 2020?
Can coaches challenge Penalties 2020? Coaches can now challenge the penalties in the first 28 minutes of each half, with the final two minutes subject to booth review, according to Rule 15, Section 3, Article 10 of the NFL Football Operations rule book. Coaches will still only be given two challenge flags per game. Does […]
What happen when air heats up?
What happen when air heats up? What happens when air is heated or cooled? So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward. This is the concept used […]
Should you always remember when handling microscope slides?
Are examples of elastic body?
Are examples of elastic body? There is no perfectly elastic body but quartz fibre and Phosphor bronze are examples of near perfect elastic bodies. If a body does not regain its original configuration at all after the deforming force is removed, it is called perfectly plastic body. Examples of near perfect plastic bodies are wax, […]
At what angle should you jump to perform the longest possible long jump?
At what angle should you jump to perform the longest possible long jump? The optimum take-off angle for a world-class long jumper may be anywhere from 15° to 27°. Linthorne, N.P. Optimum angles of projection in the throws and jumps. What are the standard views used in a 3rd angle projection? Third angle projection is […]