28 billion years
In the SI system the radiation constant (Stefan-Boltzmann constant) is measured in W/m2.K4.
i think it is speed
Yes, speed is commonly measured in kilometers per hour (km/h) in many countries around the world. This measurement is used to determine how fast an object is moving over a certain distance in a given amount of time.
The width of a highway would be best measured in meters. The length would be measured in kilometers.
Rainfall is typically measured in millimeters or inches, humidity is measured in percentage, and wind speed is measured in miles per hour or kilometers per hour.
Lightyears. The distance between the Sun and Earth is 1.49 lightyears (149 000 000 km)
Cavendish measured the gravitational constant "G".
Interplanetary distances are measured in either kilometers or in miles. For the distant planets, some measures are measured in Astronomical Units, where one AU is the distance between the Sun and the Earth. So, 1 AU = 93,000,000 miles.
The rate of expansion of the universe is measured by the Hubble constant, which is around 70 kilometers per second per megaparsec.
Bigger objects like celestial bodies ,Earth ,sun their radius are measured in kilometers .
Velocity is measured in meters/second in the S.I. system.
Distance.
42,195km
24.31 kilometers = 2,431,000 centimeters
A 26.2-mile marathon is 42.16 kilometers.
they are measured in centimeters.
Kilometers are units of one thousand meters, so they measure distance. Items that would be measured in kilometers are road lengths or air miles traveled.