Related to speed of light:light year,E=mc2 ThesaurusAntonymsRelated WordsSynonymsLegend: Switch tonew thesaurus Noun1. speed of light- the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 me...
"To obtain an idea of the size of a light-year, take the circumference of the Earth (24,900 miles), lay it out in a straight line, multiply the length of the line by 7.5 (the corresponding distance is one light-second), then place 31.6 million similar lines end to end," NASA's ...
A light year is a measure of ___. A. time B. distance C. speed D. mass 相关知识点: 试题来源: 解析 B。本题考查光年的概念。光年是长度单位,是计量天体间距离的单位,所以答案是 B。选项 A“time”是时间;选项 C“speed”是速度;选项 D“mass”是质量。
In astronomy, a light-year is a unit of ___. A. time B. distance C. speed D. weight 相关知识点: 试题来源: 解析 B。在天文学中,光年是距离的单位,所以选 B。A 选项“time”是时间;C 选项“speed”是速度;D 选项“weight”是重量,均不符合光年的定义。
speed of light 美 英 un.光速 英汉 英英 un. 1. 光速 例句 释义: 全部,光速 更多例句筛选
结果一 题目 12. A light year is the distance light travels in one year at aspeed(speed) of 299,792 kilometres per second. 答案 答案见上相关推荐 112. A light year is the distance light travels in one year at aspeed(speed) of 299,792 kilometres per second....
The meaning of SPEED OF LIGHT is a fundamental physical constant that is the speed at which electromagnetic radiation propagates in a vacuum and that has a value fixed by international convention of 299,792,458 meters per second —symbol c.
in a hushed voice in a light breeze in a long while in a mental instituti in a mincing step or in a modern in a ocean of joy fal in a preferred aspect in a retrograde order in a second place in a silent coup in a skating marathon in a sole corporation in a sort of way in ...
speedC.distanceD. intensity 相关知识点: 试题来源: 解析 【解析】该题考查名词词义辨析。energy能量,speed速度,distance距离,intensity强度;根据常识,光年是指的是光在真空中,沿着直线,经过一年的时间所传播的距离,结合句子信息推知句意:光年与距离有关。故选:C。
结果一 题目 12. A light year is the distance light travels in one year at a(speed) of 299,792 kilometres per second. 答案 speed相关推荐 112. A light year is the distance light travels in one year at a(speed) of 299,792 kilometres per second....