There are 86,400 seconds in a day. This calculation is based on the conventional definition of the length of a day; for convenience, a day is defined as 24 hours.
Know MoreA day is considered to be the amount of time it takes the earth to rotate once around its axis. This rotation takes 23 hours, 56 minutes and 4.1 seconds, which is exactly 86,164.1 seconds long.
If you measure the length of a day in solar time, it varies depending on the time of the year. Using solar time, the length of a day in seconds varies from 86,325 seconds to 86,471 seconds.
Learn more about MeasurementsThere is one-tenth of a centimeter in a millimeter. Centimeters are one one-hundredth of a meter and millimeters are one one-thousandth of a meter; therefore, there are 10 millimeters for every centimeter.
Full Answer >One kilometer equals 1,000 meters. In the International System of Units, physical quantities are represented by specific SI units. A prefix is added to represent larger and smaller multiples of each unit. The prefix "kilo" means 1,000.
Full Answer >50 kilometers is the equivalent of 31.07 miles. There are 1.61 kilometers in one mile. Kilometers are used in most of the world as the standard unit of measurement for running races and traveling, but in the United States, miles are used instead of kilometers.
Full Answer >Eighteen millimeters is equal to approximately 0.70866 inches. Each millimeter is equal to 0.039370 inches. To convert between millimeters to inches, simply multiply the value in millimeters by 0.039370 to obtain the value in inches.
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