用一根1米长的竹竿,在同一地点不同时刻测量影长 时刻是8点,10点,12点,14点,16点的影长 在校园里直立一根高1米的竹竿,在不同时刻测量影长:8:00,...
\uff081\uff09\u7528\u4e00\u68391\u7c73\u7684\u7af9\u7aff\uff0c\u5728\u540c\u4e00\u5730\u70b9\uff0c\u4e0d\u540c\u65f6\u523b\u6d4b\u91cf\u5f71\u957f\uff0c\u8bb0\u5f55\u4e0b\u6765\u3002 \u65f6\u523b8:00\uff0c10:00\uff0c12:\u89e3\uff1a
4/5 4/5 4/5 4/5
\u53d1\u73b0\uff1a\u540c\u4e00\u65f6\u523b\uff0c\u7af9\u7aff\u4e0e\u5f71\u957f\u7684\u6bd4\u4f8b\u56fa\u5b9a\u4e0d\u53d8\uff0c\u4e0e\u957f\u5ea6\u65e0\u5173\u3002
\u5728\u4e0d\u8003\u8651\u5730\u7403\u516c\u8f6c\u7684\u524d\u63d0\u4e0b\uff0c\u592a\u9633\u9ad8\u5ea6\u89d2\u7684\u5927\u5c0fh\u4e3asin h\uff1dsin \u03c6 sin \u03b4\uff0bcos \u03c6 cos \u03b4 cos t\u3002\u5728\u6b63\u5348\u65f6sinh\uff1dcos(\u03c6\uff0d\u03b4) \u3002\uff08h=90\u00b0-|\u03c6-\u03b4|\uff09\u4e5f\u5c31\u662f\u592a\u9633\u76f4\u5c04\u70b9\u79bb\u8d8a\u8fd1\uff0c\u592a\u9633\u9ad8\u5ea6\u89d2\u5c31\u8d8a\u5927\u3002
\u516c\u5f0f\u4e2d\u7684t\u8981\u5316\u6210\u89d2\u5ea6\uff0c\u4e5f\u5c31\u662f24\u5c0f\u65f6\u8981\u53d8\u6210\u5bf9\u5e94\u7684\u89d2\u5ea6\u3002\u5177\u4f53\u5982\u4e0b\uff1acost=cos{[\uff08t-12\uff1a00\uff09/12]\u00d7\u03c0}\u3002\u8bbe\u6746\u957fL\uff0c\u5f71\u957fl ,l=L/tan h \uff08h>0,\u5426\u5219\u65e0\u610f\u4e49\uff09\u3002
\u5047\u8bbe6\u5347bai18\u70b9\u843d\uff0c\u4e14\u592a\u9633\u8f68\u8ff9\u5212\u51fa\u7684\u5706\u6b63\u597d\u548c\u7af9du\u7aff\u5728\u540c\u4e00\u5e73\u9762zhi\u5185
8:00\u548c16:00 \u6839\u53f73\u7c73
10:00\u548c14:00 1\u9664\u4ee5\u6839\u53f73\u7c73
12:00 0
\u6269\u5c55\u8d44\u6599\uff1a
\u4ece\u5e73\u9762\u5916\u4e00\u70b9\u5411\u8fd9\u4e2a\u5e73\u9762\u6240\u5f15\u7684\u5782\u7ebf\u6bb5\u548c\u659c\u7ebf\u6bb5\u4e2d\uff1a
1\u3001\u5c04\u5f71\u76f8\u7b49\u7684\u4e24\u6761\u659c\u7ebf\u6bb5\u76f8\u7b49\uff0c\u5c04\u5f71\u8f83\u957f\u7684\u659c\u7ebf\u6bb5\u4e5f\u8f83\u957f\u3002
2\u3001\u76f8\u7b49\u7684\u659c\u7ebf\u6bb5\u7684\u5c04\u5f71\u76f8\u7b49\uff0c\u8f83\u957f\u7684\u659c\u7ebf\u6bb5\u7684\u5c04\u5f71\u4e5f\u8f83\u957f\u3002
3\u3001\u5782\u7ebf\u6bb5\u6bd4\u4efb\u4f55\u4e00\u6761\u659c\u7ebf\u6bb5\u90fd\u77ed\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u65e5\u843d\u5f71\u957f
8\uff1a00\u4e0e16\uff1a00\u7684\u7406\u8bba\u4e0a\u5f71\u957f\u5e94\u8be5\u76f8\u7b49\uff0c12\uff1a00\u7406\u8bba\u4e0a\u5f71\u957f\u5e94\u8be5\u4e3a0\uff0c10\uff1a00\u4e0e14\uff1a00\u7406\u8bba\u4e0a\u5f71\u957f\u5e94\u8be5\u76f8\u7b49\uff0c\u4e14\u5f71\u957f\u7684\u5927\u5c0f\u987a\u5e8f\u4e3a8\uff1a00\uff0c10\uff1a00\uff0c12\uff1a00
八点是70厘米,10点是80厘米,12点是210厘米,14点是200厘米,16点是150厘米,我量的。70,60,50,80,90
我们老师说是70,60,50,80,90.是很正确的。放心吧!!!!
400.500.700.900.1100. ok?
你所在地的纬度?知道纬度和太阳直射点才能求
绛旓細鍏偣鏄70鍘樼背锛10鐐规槸80鍘樼背锛12鐐规槸210鍘樼背锛14鐐规槸200鍘樼背锛16鐐规槸150鍘樼背锛屾垜閲忕殑銆
绛旓細鍋囪6鍗嘼ai18鐐硅惤锛屼笖澶槼杞ㄨ抗鍒掑嚭鐨勫渾姝eソ鍜绔筪u绔鍦ㄥ悓涓骞抽潰zhi鍐 8:00鍜16:00 鏍瑰彿3绫 10:00鍜14:00 1闄や互鏍瑰彿3绫 12:00 0
绛旓細400 185 130 179 383 [鍘樼背銆
绛旓細鏉嗗瓙绔嬪湪骞冲湴涓,鍏夋簮浠庢潌瀛愰《绔瀭鐩寸収灏勬椂鏄0.姘村钩鐓у皠鏃堕兘鏄棤闄愰暱.璇氬績涓轰綘瑙g瓟,缁欎釜濂借瘎鍚т翰,
绛旓細杩欐槸涓や釜鐩镐技涓夎褰紝璁惧缓绛戠墿涓篨锛岄偅涔堬紝X姣斿缓绛戠墿鐨勫奖瀛愰暱锛2.7锛夌瓑浜绔圭闀锛1锛夋瘮褰卞瓙闀匡紙0.3锛 X锛2.7=1锛0.3 X=9m
绛旓細鍥犱负鍦ㄥお闃充笅鐨勫悓涓鏃跺埢鍚屼竴鍦扮偣锛岀墿浣撶殑闀垮害涓庡奖闀挎垚姝f瘮渚嬶紝鎵浠ヤ腑鍗11鐐规椂鍦ㄥお闃充笅鐨勫悓涓鍦扮偣鏀句袱鏍归暱鐭笉涓鐨勭绔匡紝闀跨绔鐨勫奖瀛愰暱锛岀煭绔圭鐨勫奖瀛愮煭銆備緥濡傦細鏈璧风爜瑕佺煡閬撹繖涓湴鍖虹殑澶槼鐩村皠鎯呭喌锛屾垨鑰呰澶槼鍑犵偣鍗囪捣锛屽嚑鐐硅惤涓嬫垨鑰呰鏃ョ収鏃堕棿鏄灏戙傚亣濡傛槸12涓皬鏃讹紙涓鑸儏鍐碉級銆12鐐规椂褰遍暱涓0銆10...
绛旓細鎴戜笉鐭ラ亾绠楁硶锛屽湪澶忚嚦杩欏ぉ涓崍12鐐规垜鐢1绫鏉嗗疄娴嬩簡涓涓嬶紝1绫虫潌褰遍暱绾:35鐐5鍘樼背銆
绛旓細鍥犱负1M鐨勬爲鍙樻垚0.5M,鎵浠ユ瘮渚嬩负锛2锛1 5绫崇殑琚瘮鏁版槸1,鎵浠5*2=10M 绛旓細澶ф爲楂10绫.锛堟垜鏄暟瀛﹁佸笀锛
绛旓細绛旓紝姘存睜鐨勬繁搴︿负60鍘樼背銆傛牴鎹鎰忥紝灏忔槑鐢ㄧ绔挎祴閲忔按姹犳繁搴锛岀绔鎬婚暱-闇插嚭姘撮潰鐨闀垮害=姘存睜娣卞害锛屾墍浠ユ湁姘存睜娣卞害=1绫-40鍘樼背=100鍘樼背-40鍘樼背=60鍘樼背銆傚畾涔 鍔犳硶锛氭妸涓や釜鏁板悎骞舵垚涓涓暟鐨勮繍绠椼傚噺娉曪細鍦ㄥ凡鐭ヤ袱涓姞鏁扮殑鍜屼笌鍏朵腑鐨勪竴涓姞鏁帮紝姹傚彟涓涓姞鏁扮殑杩愮畻銆備箻娉曪細姹備袱涓暟涔樼Н鐨勮繍绠椼(1)涓...
绛旓細0.6鈭2.7=1鈭舵爲楂 鏍戦珮=27梅6=4.5