7,000

[Measure]  The number of grains in a pound (lb).

British imperial units for weight measures: 1 stone = 14 lb (pounds) = 224 oz (ounces) = 3584 drams = 98,000 grains = 6350.29318 g (grams) & 1 grain = 64.79891 mg (milligrams) & 1 ounce = 16 drams = 437.5 grains & 1 dram = 2711/32 grains.

 

7,001

[Math.]  A sequence of prime numbers: 71, 701, 7001, 70001 and 700001.

 

7,014

[Math.]  70142 = 49,196,196.

 

7,020

[Math.]  Sum (in degrees) of all internal angles of a 41-side polygon.

 

7,021

[Math.]  A triangular number (sum of all integers from 1 to 118): 7021 = 1+2+…+117+118.

 

7,039

[Math.]  The equality 7039×4 = 28,156 uses each of 10 digits 0-9 once.

 

7,040

[Music]   A frequency (Hz, Hertz) of the musical note A (La):

A0 = 27.5 Hz, A1 = 55 Hz, A2 = 110 Hz, A3 = 220 Hz, A4 = 440 Hz, A5 = 880 Hz, A6 = 1760 Hz,  A7 = 3520 Hz, A8 = 7040 Hz, A9 = 14,080 Hz and A10 = 28,160 Hz.

 

07nnn

[Zip]  U.S. Postal Zip Codes of New Jersey: 07nnn and 08nnn.