甲、乙两列电磁波,甲的波长是乙的5倍,则甲的频率是乙的 倍,甲、乙两...
\u7532\u4e59\u4e24\u5217\u7535\u78c1\u6ce2,\u7532\u7684\u6ce2\u957f\u662f\u4e59\u768450\u500d,\u5219\u7532\u7684\u9891\u7387\u662f\u4e59\u7684( ),\u7532\u4e59\u4e24\u5217\u6ce2\u7684\u6ce2\u901f\u4e4b\u6bd4\u4e3a( )1/50
1:1
\u7535\u78c1\u6ce2\u7684\u6ce2\u957f\u548c\u9891\u7387\u4e92\u6210\u53cd\u6bd4\u4f8b\u5173\u7cfb\uff0c\u7532\u7535\u78c1\u6ce2\u7684\u9891\u7387\u9ad8\uff0c\u6240\u4ee5\u7532\u7535\u78c1\u6ce2\u7684\u6ce2\u957f\u77ed\uff0cB\u7b26\u5408\u9898\u610f\uff0e\u6545\u9009B\uff0e
5分之1 1:1 绛旓細3锛2 鍥犱负閫熷害绛変簬娉㈤暱涔橀鐜囷紝涓旈熷害鍊间负瀹氬 璁鐢叉尝闀夸负x涔欐尝闀夸负y 鍒欐湁2x=3y x:y=3:2 绛旓細鐢电娉㈡槸涓涓瓑骞娉紝鐢电娉鐨勪紶鎾熷害鏄竴瀹氱殑锛岀數纾佹尝鐨勬尝闀瓒婇暱锛屽叾棰戠巼瓒婂皬锛堢敱鍏紡c=位f鍙煡锛夛紟鐢变笂杩板彲鐭ラ夐」A銆丅銆丏鐨勮娉曢兘涓嶆纭紟鏁呴塁锛 绛旓細B 绛旓細娉㈤暱闀匡紟B閿欙紱鍔ㄩ噺鐩哥瓑鐨勭數瀛愬拰涓瓙锛屽叾娉㈤暱搴旂浉绛夛紟C閿欙紱濡傛灉鐢层涔欎袱鐢靛瓙鐨勯熷害杩滃皬浜庡厜閫锛岀敳鐨閫熷害鏄箼鐨勪笁鍊嶏紝鐢茬殑鍔ㄩ噺涔熸槸涔欑殑涓夊嶏紝鍒鐢茬殑娉㈤暱搴鏄箼鐨 锛孌閿欙紱鏁呯瓟妗堥堿.鐐硅瘎锛氬痉甯冪綏鎰忔尝鐨勬尝闀夸笌绮掑瓙鐨勮川閲忛熷害鐨勪箻绉湁鍏筹紝鍗崇敱绮掑瓙鐨勫姩閲忓喅瀹氾紝鏍规嵁寰峰竷缃楁剰娉㈢殑娉㈤暱鍏紡璁$畻姣旇緝鍗冲彲 ... 绛旓細AB鏈変笁涓暣娉㈡晠娉㈤暱涓750/3=250m 棰戠巼=鍏夐/娉㈤暱=1.2*10^6璧吂 绛旓細瑙o紱A銆佺敳銆涔欎袱鍒绠璋愭í娉㈤兘娌縳杞存鏂瑰悜浼犳挱锛屾牴鎹滀笂涓嬪潯娉曗濆彲鐭ワ紝P璐ㄧ偣鍚戜笂鎸姩锛屽綋P鐐瑰埌杈炬尝宄版椂锛屽嵆T鐢4锛岃孮鐐瑰垯瀹屾垚T涔8锛屾晠A閿欒锛嶣銆佺敱鍏紡T=位v锛屽彲鐭ワ紝褰撴尝閫熺浉鍚屾椂锛屽懆鏈熶笌娉㈤暱鎴愭姣旓紝鐢变簬涔鐨勬尝闀挎槸鐢茬殑2鍊嶏紝鎵浠ヤ箼鐨勫懆鏈熸槸鐢2鍊嶏紝鍒鐢叉尝鐨勯鐜鏄箼娉鐨勯鐜2鍊嶏紟鏁匓閿欒C... 绛旓細1涓嶅悓锛岀浉绛锛屾尝闀涔橀鐜囩瓑浜庢尝閫燂紝绾㈠揩锛岀传婊★紝鍏変粠鐪熺┖灏勫叆绌烘皵鏃讹紝棰戠巼涓嶅彉锛屾尝闀垮拰娉㈤熷彉銆2鍦ㄥ悓绉嶄腑涓嶅悓锛屽厜缁忚繃姣斿畠娉㈤暱鐭殑浠嬭川锛屽厜瀛愪細缁曡繃鍘伙紝璧扮殑鏄洸绾裤傦紙涓撶敤鍚嶈瘝鍙灏勶級銆傚瘑搴﹁秺澶э紝鍏夐熻秺鎱 绛旓細娉㈤熴佹尝闀垮拰棰戠巼鐨勫叧绯绘槸锛歝=位f锛屾墍鏈夌數纾佹尝鐨勬尝閫熼兘鐩稿悓锛屾墍浠ョ數纾佹尝鐨勬尝闀涓庨鐜囨垚鍙嶆瘮锛庡洜涓1MHz=103kHz锛屾墍浠鐢=106.1MHz=106.1脳103kHz=1.061脳105kHz锛宖涔=1098kHz=1.098脳103kHz锛屽洜涓篺鐢诧紴f涔欙紝鎵浠ノ荤敳锛溛讳箼锛庡綋鍙戠敓闂數鏃讹紝鐢变簬鐢垫祦鐨勮繀閫熷彉鍖栧湪绌洪棿婵璧蜂簡鐢电娉紝鐢电娉㈣鏀堕煶... 绛旓細v=位*f 位=v/f=300000000/990000=303.03绫 位=v/f=300000000/15580000=19.26绫 鍗崇敳鐢靛彴鍙戝皠鐢电娉㈢殑棰戠巼涓990KHz锛屾尝闀挎槸303.03绫筹紱涔骞挎挱鐢靛彴鍙戝皠鐢电娉㈢殑棰戠巼鏄15.58MHz锛屾尝闀挎槸19.26绫炽 绛旓細鍥炵瓟锛氬懆鏈=60/100=0.6s 棰戠巼=5/3 Hz 娉㈤暱=涓ょ浉閭绘尝宄伴棿鐨勮窛绂=6 m 娉㈤=娉㈤暱X棰戠巼 =6X5/3=10m/s 本站交流只代表网友个人观点,与本站立场无关 |