Because they're designed that way. A tuning fork can be, well, "tuned" to have any desired frequency.
If these are for tuning Musical Instruments, they sound like very old Tuning Forks. The "middle C = 256 Hz" scale was in limited use at one time, but by modern standards (where the A above middle C is tuned to 440 Hz, or in some cases even higher) is a bit on the low side. Tuning your instrument to C=256Hz will make it sound "flat".
The vibrational speed of middle c (256 hz) in the well tempered and equal tempered tuning allows for the most aurally pleasing notes, so it is the key around which the pitches of all the other keys are determined.
Fundamental frequency = 1st harmonic = 256 Hz 2nd harmonic = 1st overtone = 512 Hz 3rd harmonic = 2nd overtone = 768 Hz. Look at the link: "Calculations of Harmonics from Fundamental Frequency".
it is +256
Mbale is in Uganda's area code 045, or +256 45 in international format.
No it's not, we don't use post codes in Uganda.
The GCF is 128.
128
128 + 128 = 256 16 x 16 = 256
16,384 is my best guess. -256/2 = -128 -128 + -128 = -256 -128 * -128 = 16384.
It is: 256
256
128 x 2 = 256
The answer to that is 256.
256
The LCM of 128 and 256 is 256.
n=128 Because if 2xn=256 and n= 128 then 2x128= 256
256 /2 = 128