Does frequency exists in the world?

Answer 1

Of course.

-- The frequency of my light bill is 1/month or 3.86 x 10-7 Hz.

-- If I can rev my car up to 3,500 rpm, then it's cranking at a frequency of 50 Hz.

-- Each of my dogs eats a bowlful at a frequency of 2.315 x 10-5 Hz, and I refill

their water bowls at about 1.16 x 10-4 Hz.

-- The frequency of Middle-C on my piano is about 240 Hz. (It hasn't been tuned in a while.)

-- The frequency of horizontal motion of the spot on my TV screen is 15,750 Hz.

I can't hear the TV picture but my dogs can.

-- The frequency of the power supply that my computer and my lights run on ...

the one that comes out of the wall socket ... is 60 Hz.

-- The frequency of the US presidential election mechanism is 0.000000007922 Hz.

-- The frequency of the Earth's axial rotation is 0.000011606 Hz.

-- The frequency of my favorite falling-asleep radio station is 780 kHz, and of my

favorite operating spot on ham radio is 3.735 mHz.

-- The frequency of the signal that comes out of my little key-chain laser pointer

is about 472,114 GHz.