How do you measure the extension of a spring?​

1. Measure the spring wire diameter, preferably to 3 decimal places for accuracy using calipers.

2. Measure the outside diameter of the coils (this may vary slightly coil to coil). Take the average value at the central coils of the body.

3. Measure the body length of the spring. The body length of the spring is the portion which excludes the hooks of looped ends. If the body is open wound, then also count the number of coils.

4. Measure the free length of the extension spring by measuring to the inside edge of end to end of each hook or looped end.

5. Measure the loop or hook length.

6. If the outside diameter of the loop or hook is enlarged or reduced, measure the loop or hook outside diameter.

7. If the gap is important for assembly, measure the loop or hook opening. It is the distance from the end of the wire to the spring body.

8. Note the relative position of the loops or hooks if the assembly requires alignment fit. Typical specification include: 90 degree position where the loops are twisted from each other. In-line position where the loops are aligned in the same plane. If it is an in-line position, then note if the assembly specifically needs the loop openings on the same or opposite sides. Random Position where the assembly does not matter if in-line, 90 degree, or any position in between.

9. Note the winding direction of the coils. In most applications this is not important but review surrounding parts and whether they require the spring to be in a specific direction.

10. Determine the spring wire material type. If the wire is not attracted to a magnet, then it might be a special metal alloy that needs exact identification. If the material is unknown, then take note of any extreme operating conditions such as very high or low temperatures, presence of corrosive materials or rapid cycling. Learn more about Materials, and Spring Coatings and Surface Treatments.

Explanation:

fire could start, buildings collapsing, and ash falling from the sky.

explanation:

this is because the buildings or plants could catch on fire and the buildings would most likely collapse. lastly ash would fall because all the burning would cause ash to fall from the sky.

hope this .

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.