解析 The frequency of a progressive wave is the number of cycles of the wave that pass a fixed point per unit time. 频率是指单位时间内波形重复的次数。对于进行波来说,频率指的是单位时间内波形经过某一点的次数。 简而言之,频率代表了波的振动速度,它决定了波的音调或颜色。
4 (a) State what is meant by the term polarisation when applied to a wave.[1](b)Explain why only transverse waves can be polarised.[2](c)Some films released have enabled viewing in three dimensions (3D). This can be done using two superimposed polarised images on the screen. One of ...
(a) (i) What is meant by the term enthalpy change of hydration, △H_1°_(2)=30°(ii) Write an equation that represents the AHayd of the Mg2+ ion.(iii) Suggest a reason why AHfy a of the Mg2+ ion is greater than AHyd of the Ca2+ ion.(iv) Suggest why it is impossible to...
3.1 State what is meant by a capacitance of 370 uF[2 marks03 2The charging of a 370 uF capacitor is investigated using the circuit shown in Figure 4.Both meters in the circuit are ideal.Figure 4R switch9.8 V(V370uF AThe power supply of emf 9.8 V has a negligible internal resistance....
a成为一件艺术品是生活的目的。 Becomes an artware is the life goal.[translate] a随身携带某物 Carries something along with[translate] amy telephon? 我的telephon ?[translate] a3. What is meant by “equivalent value” in translation? 3. “当量值是什么意思”在翻译?[translate]...
aIt is necessary to define what is meant by diagnosis or troubleshooting because the termsare used differently in the literature. Sometimes diagnosis refers only to the process from identification of the symptom to the determinationof the fault. In other cases, especially when onespeaks about trouble...
What is meant bythe problems of the baby class of 1991()A.large number of babies will be born after 1991.B.abies born in 1991 wont live a long life.C.The children of 1991 are not given good education.D.The world will be overpopulated.的答案是什么.用刷
What is meant by the phrase “ Communication is contextual .” ? Can you think of examples to show how context has influenced you? 2. How do you understand “ internal noise ” in the process of intercultural communication? 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用...
What is meant by the term "Rated Capacity" in relation to a forklift truck?It is the maximum load that a forklift truck is designed to carry at a specified load elevation at a specific load centre distance.只要翻译回答的部分, 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 举报 ...
aIt is necessary to define what is meant bydiagnosis or troubleshooting because the termsare used differently in the literature. Sometimesdiagnosis refers only to the process from iden-tification of the symptom to the determinationof the fault. In other cases, especially when onespeaks about trouble...