what was the light bulb( )?——() A used Give light B use for Give light C used for Giving light D used to Giving light 相关知识点: 试题来源: 解析 答案:C 核心短语/句式:be used for doing sth.:用来做某事 翻译:灯泡用什么发光? 解析:考查be used for doing sth.:用来做某事,注意for是...
百度试题 结果1 题目What does a light bulb do? A. fly B. sing C. give light D. swim 相关知识点: 试题来源: 解析 C。灯泡的功能是发光,选项 A 飞不是灯泡的功能,选项 B 唱歌不是灯泡的功能,选项 D 游泳不是灯泡的功能。反馈 收藏
What type of simple machine is a light bulb?Simple Machines:Simple machines are used to make our work easier. There are six different types of simple machines. These are the wedge, screw, wheel and axle, pulley, lever, and inclined plane. These six features can be combined in innumerable ...
Beware of confusing class A European light bulbs with type A light bulbs. Type A is a U.S. designation for standard incandescent bulbs with medium screw-in bases, such as those found in most homes prior to CFL technology. Type A light bulbs are not energy-efficient, because most use tung...
What is the mass of a light bulb?Light BulbsLight produced from electricity was invented by Humphry Davy around 1800. Without this invention, we would not have electric light bulbs. It was Thomas Edison who invented the light bulb in 1879, the year he filed its patent....
A. To produce heat B. To conduct electricity C. To reflect light D. To store E. lectricity 相关知识点: 试题来源: 解析 A。解析:灯丝在灯泡中的主要作用是产生热量,当灯丝被加热到足够高的温度时,就会发出光。选项 B,传导电流不是灯丝的主要功能;选项 C,反射光也不是灯丝的作用;选项 D,存储电更...
解析 C。解析:文章中提到“Another common symbol is the light bulb, which is represented by a circle with a cross inside.”,所以灯泡的符号是一个里面有个叉的圆,A 选项里面有个星星不是,B 选项一个里面有波浪的长方形不是,D 选项一个里面有个点的菱形也不是。
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One is the health risk posed by the mercury from fluorescent light bulbs, which replaced the incandescent bulbs in households. New efficiency regulations targeted at fluorescent bulbs were issued by President Barack...
How many joules of energy does a 100-watt light bulb use per hour? A 100-Watt incandescent light bulb is approximately 1% efficient. a. What is the power of the light emitted by such a bulb? b. How much heat (thermal energy) is produced by this b...