When the first clock was invented, How did they know what time it was?
When was first clock made? How was the time set?
Who invented the clock? What is clock? Who invented clocks? How is the time on a Speaking Clock recorded? When did we start measuring time? Why was time created? Is there an official clock in the world? When did humans first start counting the years? When did the modern era begin? Who invented the time machine? How did time begin to exist? Where did time come from? When did we start measuring time in seconds? Who decided what duration will be one second? Why did we divide an hour in 60 minutes and a minute in 60 seconds? Why not 100 minutes or 100 seconds? How did this system come to exist? What is the earliest recorded date, i.e. we could calculate that it was May 23rd year XXXX BCE and it was a Tuesday (for example)? What are the exact times in which hands of a clock divide it to three equal segments? Special Relativity: Whose clock shows more time elapsed? What is the origin of the word o'clock? What's the origin of the word o'clock? What is clock in communication? Why was Daylight Saving Time invented? What is it that makes a second a second in clocks (analog/digital)? What defines time in clocks? What if all clocks on earth were reset to 12 am, and no one remembered the exact time the event happened. Would we be able to get the old time back? A clock is set right at 10 AM. A clock gains 10 minutes in 24 hours. What will be the true time when the clock indicates 3 PM the following day? Did time machine exist? What is the measure of the angle formed by the minute and hour hands of a clock at 1:50? What clock speed should you aim for? Why? Do clocks really measure time? What is clock speed? If 2 hours ago, it was as long after one o'clock in the afternoon as it was before one o'clock in the morning, what time would it be now? Do clocks measure time or themselves?