A movie camera of the wind-up or manual type was generally timed ( internally) for a two-minute run. I am referring to the largely obsolete super-8 models. this principle was also used in the Time-Averaging- or spot-averaging theodolite- which ran two minutes and exposed a shot every two seconds- then when developed, an average of observation time could be deduced. Handy for shooting eclipses, tidal waves, etc at a safe distance for the err, Tsunami Hobby-that rhymes. so much for time machines, but here is something practical with time-lapse Photography.
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Distance equals rate times time. You're trying to solve an equation with two unknowns. You know the distance, you're trying to establish the time, but the time will vary according to the rate. At 34.96 mph, the trip will take sixty minutes. At 69.92 mph, the trip will take thirty minutes.
5:00 pm, assuming you mean all three beep at the same time. You can solve it using the roots, but the easiest way to think about it is this: Since 10 is one of the three numbers, then the result must be divisible by 10. Now take 12 and fine the next time it is divisible by 10... which is in 60 minutes. Is 60 also evenly divisible by 8? No! So, try the next number time that 12 and 10 match, (another 60 minutes) which is 120 minutes. Can 8 divide into 120 evenly? Yes, 15 times. Therefore in 120 minutes, or two hours, they will sync up. In fact they sync up every two hours or every odd hour if you prefer.
15 minutes.
It is 0825It is 0825It is 0825It is 0825
24 minutes before noon, or the current time is 11:38am.