The first mechanical clock was made in 723 A.D. by a monk and mathematician I-Hsing. It was an astronomical clock and he called it the "Water Driven Spherical Birds-Eye-View Map of The Heavens". In a few years after it was built the bronze and iron mechanism started to corrode, and in cold weather the water would freeze. In 976 A.D. Chang Ssu Hsiin built the same clock except he used Mercury instead of water, but few details of this clock survive. This was the first successful clock that didn't have serious defects. A clock made by Su Sung, an astronomer, on the order of emperor Ting Zong in 1090 was 30 feet tall and was used to clock the planets and stars, and to keep track of the time. On the top was a spherical astronomical instrument used to measure the stars and driven by the clock's giant water-powered mechanism. Inside the tower was a smaller celestial globe whose movements were the same as the one on the roof and which could be viewed in bad weather or if the one on the roof was crowded. On the front of the tower was a pagoda-like structure of five floors, each housing numerous wooden puppets. The puppets would appear about every quarter of an hour day and night, and would play drums, bells, gongs, and string instruments. All the puppets' movements were controlled by the clock's machinery. The clock was powered by a huge water wheel with scoops on the ends of each blade. Water dripped into a scoop until it was full,, and then the wheel would turn, causing the water in the scoop to be poured out into a basin and the next scoop to progress and start the process all over again. When the wheel turned the puppets would change and so would the astronomical clocks. Su Sung's clock ran from 1090-1126, when it was moved to Peking, were it stood for several more years. The design for these Chinese clocks was later copied by the Europeans, and they were even originally credited for first inventing them. The clocks made by the Chinese are to me one of the best things that the Chinese invented. They look astounding in pictures, but must have been breath taking in real life.
you put the ice cube in a cup, and then time a set number of minutes, after the set number of minutes is done, pour it into a graduated cylinder and measure it that way. Keep doing this for a the smae amount of time each time until the ice cube melts all the way.
No such conversion is possible; Seconds measure time, Litres measure volume (1 US gallon = 3.78 litres, 1 UK gallon = 4.55 litres).
It is important to measure the absorbance of the solution with the lowest concentration first because it helps establish a baseline for comparison. This allows for accurate determination of the concentration of other solutions by ensuring that the measurements are within the detection range of the instrument.
Common methods used to measure coagulation include the prothrombin time (PT), activated partial thromboplastin time (aPTT), international normalized ratio (INR), and thrombin time (TT). These tests help assess the clotting function of the blood and are useful in monitoring patients on anticoagulant therapy or those with bleeding disorders.
You can measure the rate of starch breakdown by regularly sampling the solution over time and using a test, such as iodine, to track the disappearance of starch. Record the time it takes for the solution to no longer show a blue color, indicating complete starch breakdown. Calculate the rate of breakdown by analyzing the change in color intensity over time.
they used sundials to measure time so yeah
One of the first reasons early people needed to measure time was to know when to plant and harvest their crops.
charles carroll
No one invented time. It is a property of the universe, simply a measure of duration.
To measure time. To measure time. To measure time.
Brian measures time by major events, First Food etc...
what was the first society to have a republic
watches kind of like compasses!
Galileo Galilei was one of the first scientists to measure speed and distance over time. He used inclined planes and rolling balls to investigate acceleration and the law of falling bodies.
charles carroll
It was first used during World War I as an energy saving measure.
The time signature is 4/4 and it comes in on the 4th beat of the first measure with two 1/8th notes with the words "When the" and then the first beat of the second measure falls on the word "Sun".