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What does the color-coding of needles indicate?

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What does the color coding green pink blue in the periodic table indicate?

The color coding in the Periodic Table of the Elements shows the different familes of elements. There are further sub-groupings existent. For example, there are six different colors used for the metals, one for metalloids, and three for non-metals. Green represents "Other Non-Metals". Pink is used for the Actinides. Blue indicates that a substance is a member of the Noble Gases.


What is the colour coding for pipes carrying natural gas?

Pipes carrying natural gas are typically color-coded with a yellow exterior to indicate that they contain gas. This yellow color helps workers and emergency responders easily identify gas lines and take appropriate safety precautions.


Why are iron needles good in compasses?

Iron needles are good in compasses because they are easily magnetized, allowing them to align with the Earth's magnetic field. This alignment helps to indicate the cardinal directions (north, south, east, west) accurately. Additionally, iron needles are lightweight and durable, making them practical for compass use.


What does the compass needles indicate about the iron nail shown below in figure 6?

Without the specific figure to refer to, I can provide a general answer. Compass needles will align themselves along the magnetic field lines of a magnet. If the iron nail is magnetized, the compass needles will point towards the ends of the nail, indicating the presence of a magnetic field. If the nail is not magnetized, the compass needles will show no significant movement around it.