The maximum kinetic energy of the ejected electrons is only dependent on the frequency but not the intensity of the incident light. n n --.. 2(b) A student wants to investigate how the stopping potential is dependent on the frequency of the incident electromagnetic radiation.(i) Complete ...
这里meant 是mean 的被动语态。例(1)：主动语态： “Forthrightness” means what?被动语态： What is meant by “forthrightness”?例(2)：主动语态： Rita writes a letter.被动语态： A letter is written by Rita.例(3)：主动语态： 一辆车撞死了行人 被动语态： 行人被一辆车撞死...
在某小学进行体检时,发现有少量学生吵嘴有轻度溃疡,思疑可能是某营养素缺少, 并进行了相应的实验室检查。该营养素及其相应的实验室检测项目分别是:①维生素 B1②维生素 B2③红细胞转酮醇酶活性系数④全血谷胱甘肽复原酶活力系数
6(a) Explain what is meant by(i) a progressive wave,[2](ii) the diffraction of a wave.[2](b) Two microwave sources S1 and S2 are situated as shown in Fig. 6.1. The waves emitted by the two sources are in phase and are polarised in the same plane.1》P -5.0cm o-1S2一一3.2...
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(1) What is meant by the term neutral oxide?[1] [Total: 8] 相关知识点: 试题来源: 解析 The term "neutral oxide" refers to an oxide that does not have a distinct acid or base character. "Neutral oxide" refers to an oxide that does not exhibit acidic or basic properties. Unlike ...
字数:150字左右!大学水平内容:1.what is meant by "thinking positively?" 2.what is the connection between success and optimism?3.How can we keep an optimistic and positive attitude?必须包含这三条信息且内容连贯,内容可以自编, 2 写作文,要求:有些文采,不要有太多的语法错误(会用一些从句之类的句子...
A. Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel B. Stations remaining off the air to safeguard proprietary information C. Two three-minute silent periods,at 15 and 45 minutes after the hour,that provide a transmitt...
3 (a)State what is meant by simple harmonic motion.[2](b) A trolley o f mass m is held on a horizontal surface by means o f two springs. One spring is attached to a fixed point P. The other spring is connected to an oscillator, as shown in Fig. 3.1.spring trolley spring osc...
(a) State what is meant by the specific latent heat of fusion (melting) of a substance.[2] 相关知识点: 试题来源: 解析 (a) energy/heat needed to change state of substance/melt(from solid to liquid at constant temperature/ melting point) per kg/per unit mass ...