One thing not mentioned by the other answers so far is that the centre of mass of the hammer-ruler-string (viewed as a single object) must be under the table (to the right of the table edge in the image) for the setup to work. This is because the only forces external to it and acting on it are gravity and the forces from the table surface. If the centre of mass were not under the table, the table would not be able to provide a force that exactly counters the force on it due to gravity, and the torque will cause it to tilt so that the centre of mass goes towards the table. In this case that will cause the ruler to be touching the table only at the edge, and most combinations of ruler and table wo not allow it to stay there without sliding off.If it is hard to grasp that the centre of mass of a hammer is very near its head, there is an easy way to 'see' it. Simply put the hammer on the table with the handle sticking out off the edge of the table. You can easily get it to stick as far out as in the image in the question, for exactly the same reason. It makes sense because the metal part is much denser than the wood part, and intuitively one can understand it as meaning that it is harder to move a denser object so the wood part cannot easily pull the metal part off the table because it would have to make the metal part rise up first, which is difficult due to its much greater inertia. The density merely explains how a smaller part can have a larger inertia (reluctance to move). Of course, all this can be translated into a physics explanation, but I think it can serve as an intuitive help
1. Abbreviation of "number (of)â in a table heading
My suggestion would be to use #. The hash symbol is commonly used this way; in mathematics it's even used to denote the cardinality of a set, i.e. the number of items in a set.Having said that, I think abbreviating it as No. is perfectly clear if your usage is along the lines of No. of x. If you think your audience will be more familiar with one of the two, go for that
2. Update Mysql table row
You need a condition() so that it knows which record to update. When you do not give a condition, it just does not update anything. More Info on db_update()The following says, "Update firstname to formvalue, lastname to formvalue WHERE the last name as stored in database is 'Bolli'". To avoid conflicts, your table should have a field that contains a unique value for each entry, such as an auto-increment primary key. That way, you can say "UPDATE ... WHERE id = unique_id"
3. How to align rotated table texts?
You do not need multirow, parbox will do it.:
4. Formula in table header cells
If you use Table, Convert to Range it should keep the colouration of alternate rows but still allow formulae in the column headings
5. Is table tennis based on tennis?
So imo, yes it is based on tennis since those military guys probably knew what the tennis was.Hodges 1993, p. 2 Letts, Greg. "A Brief History of Table Tennis/Ping-Pong". About.com. The New York Times Company. WashingtonPost.com.
6. Remove padding in table with images
You can change the arraystretch likeChoose an appropriate value.You can also remove that space on a row basis by adding [-dpstrutbox] at the end of row. All credits to egreg for dpstrutbox
7. Nested table using pageblock
You need to use breakBefore and colspan parameters of the apex:column:The result:
8. more questions on periodic table?
Yes. Generally the higher the atomic number, the higher the atomic mass
9. Routing table in QNX [closed]
According to documents you need explicitly enable IP forwarding:net.inet.ip.forwarding Disable (0) or enable (1) IP forwarding. If this is enabled, the host acts as a router.That would be 'sysctl -w net.inet.ip.forwarding=1'I do not have QNX to test, but I do not think you need to add any routes, as the connected interfaces already have network, i.e. route already exists.But confirm with 'netstat -r'
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