50 Hz AC electricity 31.25 milliseconds – a hundred twenty-eighth note at 60 BPM 33.367 milliseconds – the amount of time one frame lasts in 29.97 fps video (most common for NTSC-legacy formats) 41.667 milliseconds – the amount of time one frame lasts in 24 fps video (most common cinematic frame rate) 41.708 milliseconds – the amount of time one frame lasts in 23.976 fps video (cinematic frame rate for NTSC-legacy formats) 50 milliseconds – the time interval between gear changes on a Lamborghini Aventador; with a 7-speed single-clutch automated manual transmission 50 milliseconds – cycle time for the lowest audible tone, 20 Hz 60 milliseconds – cycle time for European 16.7 Hz AC electrified railroad power grid 60 milliseconds – the time interval between gear changes on a Ferrari 458 Spider; with a 7-speed dual-clutch automatic transmission 62.5 milliseconds – a sixty-fourth note at 60 BPM 5 to 80 milliseconds – typical latency for a broadband internet connection (important for playing online games) 100 milliseconds – the time interval between gear changes on a Ferrari FXX; with a 6-speed single-clutch automated manual transmission 125 milliseconds – a thirty-second note at 60 BPM 134 milliseconds – time taken by light to travel around the Earth's equator 150 milliseconds – recommended maximum time delay for telephone service 100 - 400 milliseconds – the time for the human eye to blink 185 milliseconds – the duration of a full rotation of the main rotor on Bell 205, 212, and 412 helicopters (normal rotor speed is 324 RPM) 200 milliseconds – the time it takes the human brain to recognize emotion in facial expressions 250 milliseconds – a sixteenth note at 60 BPM 400 milliseconds – time in which the fastest baseball pitches reach the strike zone 430 to 500 milliseconds – common modern dance music tempos (120–140 BPM) 495 milliseconds – an approximate average of the round trip time for communications via geosynchronous satellites 500 milliseconds – an eighth note at 60 BPM 770 milliseconds – revolution period of a 78 rpm record 860 milliseconds – average human resting heart cycle time 1000 milliseconds – one second; the period of a 1 Hz oscillator 86,400,000 (24 × 60 × 60 × 1000) milliseconds – one day 604,800,000 (24 × 60 × 60 × 1000 × 7) milliseconds – one week 31,556,925,974.7 (86,400,000 × approximately 365.242) milliseconds – one year See also International