3.What is the speed of light in vacuum?Write it in scientific notation with two digits of precision.相关知识点: 试题来源: 解析 光在真空中的速度是多少?用两位数字精度的科学计数法 ANSWER: The speed of light in vacuum is 299,792,458 metre per second.It is about 3.00×10^8m/s ...
What is the speed of light in a vacuum? A. About 300,000 kilometers per second. B. About 3,000 kilometers per second. C. About 30,000 kilometers per second. D. About 3,000,000 kilometers per second. 相关知识点: 试题来源: 解析 A。本题考查对光速的了解。光在真空中的速度约为...
What is the speed of light in a vacuum? 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。
The speed of light in vacuum is approximately 300,000 kilometers per second. Which of the following statements is correct about the speed of light? A. It is always the same regardless of the medium. B. It is slower in air than in vacuum. C. It is faster in water than in vacuum. ...
The speed of light in a vacuum is about ___. A. 300,000 kilometers per second B. 300,000 meters per second C. 30,000 kilometers per second D. 3,000 kilometers per second 相关知识点: 试题来源: 解析 A。光在真空中的速度约为 300,000 千米每秒,这是物理学中的基本常识,B 选项米...
The speed of light in a vacuum is approximately ___. A. 300,000 kilometers per second B. 3,000 kilometers per second C. 30 kilometers per second D. 3 kilometers per second 相关知识点: 试题来源: 解析 A。解析:光在真空中的速度约为 30 万千米每秒。其他选项的速度都远小于光在真空中...
A. 300,000 kilometers per second B. 100,000 kilometers per hour C. 500,000 meters per minute D. 200,000 miles per hour 相关知识点: 试题来源: 解析 A。解析:光在真空中的速度大约是 30 万千米每秒。其他选项的速度都不正确。反馈 收藏 ...
百度试题 结果1 题目The speed of light in vacuum is approximately ___ meters per second. A. 300,000 B. 200,000 C. 100,000 D. 400,000 相关知识点: 试题来源: 解析 A。真空中的光速约为 300,000 米每秒。所以选 300,000。反馈 收藏 ...
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 meters per second light speed,c constant- a number representing a quantity assumed to have a fixed value in a specifie...
What is the speed of light in vacuum? A. 3×10⁵ m/s B. 3×10⁶ m/s C. 3×10⁷ m/s D. 3×10⁸ m/s 相关知识点: 试题来源: 解析 D。光在真空中的速度是 3×10⁸ m/s。A、B、C 选项数值错误。本题涉及光在真空中速度的物理知识,阅读技巧是记住这个重要的物理常量。