expiredTattyBear | Staff posted Mar 14, 2025 03:32 PM
Item 1 of 5
Item 1 of 5
expiredTattyBear | Staff posted Mar 14, 2025 03:32 PM
Small Round Magnets Set: 259-pc (7 sizes) or 500-pc (5 sizes)
$9 each
$15
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To determine which deal offers better value, we can compare the total volume of the magnets in each set. This will give us a rough estimate of the amount of magnetic material you're getting. Here's the volume of each magnet, calculated as π×r2×h\pi \times r^2 \times h, where rr is the radius and hh is the height:
259-piece Set
100 pcs 3x1mm: π×(1.52)×1×100=706.86 mm3\pi \times (1.5^2) \times 1 \times 100 = 706.86 \, \text{mm}^3
54 pcs 5x1mm: π×(2.52)×1×54=1,062.52 mm3\pi \times (2.5^2) \times 1 \times 54 = 1,062.52 \, \text{mm}^3
40 pcs 6x2mm: π×(32)×2×40=2,261.95 mm3\pi \times (3^2) \times 2 \times 40 = 2,261.95 \, \text{mm}^3
30 pcs 8x2mm: π×(42)×2×30=3,015.93 mm3\pi \times (4^2) \times 2 \times 30 = 3,015.93 \, \text{mm}^3
20 pcs 10x2mm: π×(52)×2×20=3,141.59 mm3\pi \times (5^2) \times 2 \times 20 = 3,141.59 \, \text{mm}^3
10 pcs 12x3mm: π×(62)×3×10=3,393.80 mm3\pi \times (6^2) \times 3 \times 10 = 3,393.80 \, \text{mm}^3
5 pcs 20x2mm: π×(102)×2×5=3,141.59 mm3\pi \times (10^2) \times 2 \times 5 = 3,141.59 \, \text{mm}^3
Total Volume for 259-piece Set:
706.86+1,062.52+2,261.95+3,015.93+3,141.59+3,393.80+3,141.59=16,724.24 mm3706.86 + 1,062.52 + 2,261.95 + 3,015.93 + 3,141.59 + 3,393.80 + 3,141.59 = 16,724.24 \, \text{mm}^3
500-piece Set
100 pcs 8x2mm: π×(42)×2×100=10,053.10 mm3\pi \times (4^2) \times 2 \times 100 = 10,053.10 \, \text{mm}^3
100 pcs 6x2mm: π×(32)×2×100=5,654.87 mm3\pi \times (3^2) \times 2 \times 100 = 5,654.87 \, \text{mm}^3
100 pcs 5x2mm: π×(2.52)×2×100=3,926.99 mm3\pi \times (2.5^2) \times 2 \times 100 = 3,926.99 \, \text{mm}^3
100 pcs 4x2mm: π×(22)×2×100=2,513.27 mm3\pi \times (2^2) \times 2 \times 100 = 2,513.27 \, \text{mm}^3
100 pcs 3x2mm: π×(1.52)×2×100=1,413.72 mm3\pi \times (1.5^2) \times 2 \times 100 = 1,413.72 \, \text{mm}^3
Total Volume for 500-piece Set:
10,053.10+5,654.87+3,926.99+2,513.27+1,413.72=23,561.95 mm310,053.10 + 5,654.87 + 3,926.99 + 2,513.27 + 1,413.72 = 23,561.95 \, \text{mm}^3
Conclusion
The 500-piece set provides a greater total volume of magnetic material (23,561.95 mm³) compared to the 259-piece set (16,724.24 mm³). Thus, the 500-piece set offers a better deal in terms of the amount of magnetic material you're getting.
If you need any further analysis or have other questions, feel free to ask!
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Neodymium magnets range from N35 to N55 in grade. The higher the grade, or N number, the incrementally stronger the magnet will be.
The grades of neodymium magnets are measured in Tesla metrics or units of Gauss Oersted (MGOe).
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To determine which deal offers better value, ...
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You can use these to detect high levels of magnesium/zinc in wild caught fish. But not nickel. Stupid physics.
Zapping them with a high amount of voltage turns them into paperweights.
Depending on the fridge or the location on the fridge, you can use these to hold up the award your kid brought home from school without leaving tape residue.
Unfortunately, sticking them to the bottom of motorcycles does not help trip traffic lights. If they did, manufacturers would include them out of the factory.
So, there is 5 uses. And you still have 252 more magnets to spare.
They're also nice to check if you have lead pipes in your house.
- 100 pcs 3x1mm: π×(1.52)×1×100=706.86 mm3\pi \times (1.5^2) \times 1 \times 100 = 706.86 \, \text{mm}^3
- 54 pcs 5x1mm: π×(2.52)×1×54=1,062.52 mm3\pi \times (2.5^2) \times 1 \times 54 = 1,062.52 \, \text{mm}^3
- 40 pcs 6x2mm: π×(32)×2×40=2,261.95 mm3\pi \times (3^2) \times 2 \times 40 = 2,261.95 \, \text{mm}^3
- 30 pcs 8x2mm: π×(42)×2×30=3,015.93 mm3\pi \times (4^2) \times 2 \times 30 = 3,015.93 \, \text{mm}^3
- 20 pcs 10x2mm: π×(52)×2×20=3,141.59 mm3\pi \times (5^2) \times 2 \times 20 = 3,141.59 \, \text{mm}^3
- 10 pcs 12x3mm: π×(62)×3×10=3,393.80 mm3\pi \times (6^2) \times 3 \times 10 = 3,393.80 \, \text{mm}^3
- 5 pcs 20x2mm: π×(102)×2×5=3,141.59 mm3\pi \times (10^2) \times 2 \times 5 = 3,141.59 \, \text{mm}^3
Total Volume for 259-piece Set:706.86+1,062.52+2,261.95+3,015.93+3,141.59+3,393.80+3,141.59=16,724.24 mm3706.86 + 1,062.52 + 2,261.95 + 3,015.93 + 3,141.59 + 3,393.80 + 3,141.59 = 16,724.24 \, \text{mm}^3500-piece Set- 100 pcs 8x2mm: π×(42)×2×100=10,053.10 mm3\pi \times (4^2) \times 2 \times 100 = 10,053.10 \, \text{mm}^3
- 100 pcs 6x2mm: π×(32)×2×100=5,654.87 mm3\pi \times (3^2) \times 2 \times 100 = 5,654.87 \, \text{mm}^3
- 100 pcs 5x2mm: π×(2.52)×2×100=3,926.99 mm3\pi \times (2.5^2) \times 2 \times 100 = 3,926.99 \, \text{mm}^3
- 100 pcs 4x2mm: π×(22)×2×100=2,513.27 mm3\pi \times (2^2) \times 2 \times 100 = 2,513.27 \, \text{mm}^3
- 100 pcs 3x2mm: π×(1.52)×2×100=1,413.72 mm3\pi \times (1.5^2) \times 2 \times 100 = 1,413.72 \, \text{mm}^3
Total Volume for 500-piece Set:10,053.10+5,654.87+3,926.99+2,513.27+1,413.72=23,561.95 mm310,053.10 + 5,654.87 + 3,926.99 + 2,513.27 + 1,413.72 = 23,561.95 \, \text{mm}^3ConclusionThe 500-piece set provides a greater total volume of magnetic material (23,561.95 mm³) compared to the 259-piece set (16,724.24 mm³). Thus, the 500-piece set offers a better deal in terms of the amount of magnetic material you're getting.If you need any further analysis or have other questions, feel free to ask!Sign up for a Slickdeals account to remove this ad.
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