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...
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。反馈 收藏 ...
"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。反馈...
( C )3. Light Year is related to A. energy B. speed C. distance D. intensity 相关知识点: 试题来源: 解析 答案见上【答案】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...
Kids Definition speed of light : a fundamental physical constant that is the speed at which electromagnetic radiation travels in a vacuum and that has a value of 299,792,458 meters per second More from Merriam-Webster on speed of light Britannica.com: Encyclopedia article about speed of ...
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....
百度试题 结果1 题目11. “Light year" is a unit of BA. brightnessB. distanceC. timeD. speed 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
is to light 5. [c] 快门速度the time taken by a camera shutter to open and close 自行车;汽车on bicycle/car 6. [c] 排挡;速a gear on a bicycle, in a car, etc. 毒品drug 7. [u] (informal) 苯丙胺,安非他明(一种兴奋剂)an illegal amphetamine drug that is taken to give feelings of ...
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