8 (a)State what is meant by a photon.*...…***...[2](b) A beam of light is incident normally on a metal surface, as illustrated in Fig. 8.1.light beam metal surface are a of cross-section1.3 ×10-5 m2Fig.8.1The beam of light has cross-sectional are a 1.3 × 10-5...
解析 Isotopes are variants of a particular chemical element which differ in neutron number. 同位素是指具有相同原子序数(即质子数相同)但中子数不同的同一元素的不同原子。由于质子数相同,同位素具有相同的化学性质,但由于中子数不同,它们的原子质量会有所不同。
That iswhat is meant by" failure is the mother of success " " 失败是成功之母 " 就是这个意思. 互联网 Hobson :What is meant bythe term Clearing House Association? 霍布森: 票据交换是什么意思? 互联网 What is meant bya longitudinal and transverse weld?
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...
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 ...
(i) Explain what is meant by an ideal gas.[2](ii)Given po= atmospheric pressure Pm = pressure due to the mercury column T= temperature of the trapped gas n = number of moles of the trapped gas A = cross-sectional area of the tube Show that (P , D ) × 0.1 9 0= nRT[1](i...
What is meant by a “home-run book”?A.A book which is so good you are unable to put it down.B.A book that the whole family can enjoy.C.A children's book that is read and appreciated by adults.D.A book that hits hard like a home run in the game of baseball. 相关知识点: ...
B.Havingahealthyandbalanceddietisveryimportant. C.Tryinggivingyourselfabreakwillbeagoodway. D.Itmakesitalmostimpossibletofindthetruecauseofmemoryloss. E.Thisruleappliestothebrainaswell. F.Itisveryhelpfultohavearegularplacetoputthingsin. G.Thefollowingarethetopthreereasonsformemorylossandhowyoucanavoidthem....
What is meant by the superposition principle?Continuous Charge Distribution:We know that +e or -e is the lowest form of a charge that may be obtained charges are quantized, thus If all the charges are tightly linked together, there is very little space between them....
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