The speed of light is about 300 million meters per second. What is the unit of speed? A. meter per second B. kilogram C. newton D. joule 相关知识点: 试题来源: 解析 A。速度的单位是米每秒,meter per second;B 选项 kilogram 是千克,质量单位;C 选项 newton 是牛顿,力的单位;D 选项 joule...
百度试题 结果1 题目___ is the speed of light? A. What B. How much C. How fast D. How many 相关知识点: 试题来源: 解析 A。“光速是什么?”询问事物的内容用 what。反馈 收藏
What is the speed of light? 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。解析:光速约为每秒 300000 千米。B、C、D 选项的数值都不...
题目What is the speed of light? A. 300,000 kilometers per second. B. 300,000 meters per second. C. 30,000 kilometers per second. D. 30,000 meters per second. 相关知识点: 试题来源: 解析 A。光的速度是 30 万千米每秒,所以答案是 A。B、C、D 选项的速度都不对。
What are the characteristics of light waves? What are the basic si units for the speed of light? What is the relationship between refraction and the speed of light? What determines the energy of an electron? How did Maxwell calculate the speed of light?
Speed of Light | Distance & Light-Years from Chapter 8 / Lesson 3 25K Learn how fast light travels and find the speed of light in meters or miles per second. Understand the significance of light-years and lookback time with examples. Related...
题目Light travels very fast. What is the speed of light? A. 300,000 kilometers per second. B. 30 kilometers per hour. C. 3,000 meters per minute. 相关知识点: 试题来源: 解析 A。光的速度是每秒 30 万公里。其他选项速度不对。
Scientists measure the speed of light as approximately 299,792,458 _ per second. What is the correct unit? A. kilometers B. meters C. centimeters D. millimeters 相关知识点: 试题来源: 解析 B。解析:光速非常快,其单位是米每秒,千米每秒不符合光速的准确单位,厘米和毫米每秒数值会过小,不符合光速...
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...
A. It is the fastest speed possible. B. It can be slowed down in certain conditions. C. It is always constant. D. It is only applicable in space. 相关知识点: 试题来源: 解析 B。选项 A 虽然光在真空中速度很快,但不能说它是最快速度可能,理论上可能有超光速现象未被发现;选项 B 在一些...