百度试题 结果1 题目The speed of light in a vacuum is approximately ___ meters per second.相关知识点: 试题来源: 解析 答案:299,792,458 反馈 收藏
百度试题 结果1 题目The speed of light in a vacuum is approximately ___ meters per second.相关知识点: 试题来源: 解析 答案:299,792,458 反馈 收藏
The speed of light in kilometers per second is 0.00299792458 kilometers per second, or 0.003 km per second. The equation below explain how to...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough homewo...
将“光所拥有的速度”视为像车速一样物理量一样时，它就可以有不同的测量精度版本，另外光在不同介质中的速度也确实不一样，所以可以有a speed of light，比如 【例句1】Romer calculated a speed of light of around 220,000 kilometers per second. (罗默计算出的光速约为每秒22万公里。)对a speed of ...
A. 300,000 kilometers per second. B. 200,000 kilometers per second. C. 100,000 kilometers per second. D. 400,000 kilometers per second. 相关知识点: 试题来源: 解析 A。本题考查科普知识,光在真空中的速度是 30 万千米每秒。其他选项的速度都不准确。反馈...
A. three hundred thousand B. three hundreds thousand C. three hundred thousands D. three hundreds thousands of 相关知识点: 试题来源: 解析 A。“hundred”“thousand”等词,前面有具体数字时,不用复数形式,也不能加“of”,所以“三百千米”是“three hundred thousand kilometers”。反馈 收藏 ...
What is the speed of light in a vacuum? A. 300,000 kilometers per second B. 200,000 kilometers per second C. 100,000 kilometers per second D. 50,000 kilometers per second 相关知识点: 试题来源: 解析 A。真空中光速是 30 万千米每秒。其他选项速度均不对。
百度试题 结果1 题目The speed of light is about ___ kilometers per second. A. 300,000 B. 400,000 C. 500,000 D. 600,000 相关知识点: 试题来源: 解析 A。解析:光速约为 30 万千米每秒。反馈 收藏
A. 300,000 kilometers per second. B. 30,000 kilometers per second. C. 3,000 kilometers per second. D. 300 kilometers per second. 相关知识点: 试题来源: 解析 A。解析:真空中的光速是 30 万千米每秒。选项 B、C、D 的速度都不正确。反馈...
百度试题 结果1 题目The s of light is 300 million meters per second.相关知识点: 试题来源: 解析 speed 反馈 收藏