We know that light year is the distance travelled by light in one year and the speed of light is3*10^8 metre per second. Express one light year into kilometre. A A 9.46*10^(12)km B) 9.46*10^(18)km c) 9.46*10^(15)km D) 9.46*10^(13)km E)None of these 相关知识点: 试...
18. He had an awakening, a small enlightenment, while reading and reciting the Dharma Flower Sutra, and so he travelled a long distance, not minding the rigors of the journey, in order to visit Dhyana Master Shouchang and request certification from him. ...
In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. Mileage A number of miles travelled or covered The car is in good condition, considering its mileage Distance The length of the space between two points You may have to ...
A light year is another unit for measuring distance. The distance travelled by light in a year is called a light year. 9.46×1017cm=1 light year . The mean radius of the earth’s orbit, measured in parsecs or pcs, is one second of arc. In astronomy, it is the unit of distance. ...
; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast" locomote, move, travel circulate, go around, spread - become widely ...
A light year is the distance light would travel in a vacuum after one year. It is equal to some nine quadrillion meters (six trillion miles). This unit is described in more detail in the next section.Just the factsDistance is the sum of the length travelled around the path of motion. ...
In fact, more things travelled along the Silk Road than traders and goods. Ideas travelled along the Silk Road as well. The ideas changed the world.【1】Why was it difficult for the ancient Romans to know the silk makerA.Because the silk makers didn’t want to be conquered.B.Because ...
Later it was redefined once more using the speed of light. This definition is used today and states that one meter is equal to the length of the path traveled by light in a vacuum in 1/299,792,458 of a second. Calculations In geometry, the distance between two points A and B with ...
For a stationary object, the distance covered is the same in both directions. Since the velocity of the object is a vector, its magnitude is also the same, and therefore the distance travelled is the same. If an object travels in a straight line for a period of time, then the distance...
A plane flew at a constant speed and travelled 762 miles in 5 hours. How many miles would the plane travel in 3 hours at the same speed? If the average speed of a light plane had been 40 km/h less, the plane would have ...