体积为0.1cm³的一滴植物油掉在桌面上,其扩散面积最大值为2m²，则此植物油分子的直径为多大
\u4f53\u79ef\u4e3a0.1m^2\u7684\u4e00\u6ef4\u690d\u7269\u6cb9\u6389\u5728\u684c\u9762\u4e0a,\u5176\u6269\u6563\u9762\u79ef\u7684\u6700\u5927\u503c\u4e3a2m^2\uff0c\u5219\u6b64\u690d\u7269\u6cb9\u5206\u5b50\u7684\u76f4\u5f84\u4e3a\u591a\u5927\uff1f\u690d\u7269\u6cb9\u5206\u5b50\u7684\u76f4\u5f84d
d=v/s=0.1/2=0.05m=5cm
\u672c\u9898\u6570\u636e\u6709\u79d1\u5b66\u6027\u9519\u8bef
\u5206\u5b50\u76f4\u5f84\u7684\u6570\u91cf\u7ea710^-10m,\u8089\u773c\u4e0d\u80fd\u76f4\u63a5\u89c2\u5bdf\uff0c\u5fc5\u987b\u7528\u7535\u5b50\u663e\u5fae\u955c\u624d\u80fd\u770b\u5230\u3002
\u6c34\u5e73\u684c\u9762\u7684\u9762\u79ef\u662f1\u5e73\u65b9\u5398\u7c73\uff1f\u8fd9\u4e2a\u9762\u79ef\u592a\u5c0f\u4e86\u5427\uff0c\u6211\u63091\u5e73\u65b9\u7c73\u6765\u8ba1
\uff081\uff09
\u53d7\u529b\u9762\u79ef\uff1aS\uff1d100cm²\uff1d0.01m²
\u74f6\u5b50\u7684\u91cd\u529b\u7b49\u4e8e\u74f6\u5b50\u5bf9\u684c\u9762\u7684\u538b\u529b\uff1aF\uff1dPS\uff1d100pa\u00d70.01m²\uff1d1N
\uff082)
\u6c34\u5bf9\u5ea6\u9762\u7684\u538b\u5f3a\uff1aP\uff1d\u03c1\u6c34gh
900pa\uff1d1000 kg/m³ \u00d7 10N/kg \u00d7 h
\u6c34\u7684\u6df1\u5ea6\uff1ah=0.09m=9cm
绛旓細鈭祊=FS锛岄潰绉槸锛歋=20cm脳20cm=400cm2=0.04m2锛涒埓姘村瀹瑰櫒搴曠殑鍘嬪姏涓猴細F=pS=2940Pa脳0.04m2=117.6N锛涳紙3锛夋柟娉曚竴锛氭嵁娴姏鐨勪骇鐢熷師鍥犲彲鐭ワ紝姝ゆ椂鐗╀綋鎵鍙楃殑娴姏绛変簬鍏朵笂涓嬭〃闈㈢殑鍘嬪姏宸紱鏁匜娴=F涓-F涓=117.6N-39.2N=78.4N锛涙柟娉曚簩锛氭鏃剁墿浣撶殑浣撶Н鏄锛歏=20cm脳20cm脳20cm=8000cm3=0....
绛旓細銆愮瓟妗堛戯細璁捐竟闀縧=70锛屛磍=|dl|=0.1锛 浣撶НV=l3dV=3l2dl缁濆璇樊未V=|dV|=|3l2dl|=3脳702脳0.1=3脳4900脳0.1=1740cm3锛庣浉瀵硅宸
绛旓細绗簩鍙ヨ瘽鍛婅瘔浣犺繖涓贩鍚堢墿鐨勬婚噸涓209鍏嬨傛帓寮鐨勬按鐨浣撶Н涓209cm3銆傚洜涓烘紓娴簬姘翠腑锛屾墍浠ョ敱闃垮熀绫冲痉鍘熺悊鍙绠楀嚭銆傛湁璐ㄩ噺鏈夊瘑搴﹀彲浠ヨ绠楀嚭鎬讳綋涓220绔嬫柟鍘樼背銆傚叧閿槸瀵瑰啺铻嶅寲鍚庢按闈㈠張涓嬮檷浜唄2=0.1cm鐨勭悊瑙ｃ傝繖涓彲浠ヨ繖鏍风湅:婕傛诞浜庢按闈㈡椂鎺掑紑鐨勬按鐨勪綋绉-(鍐板寲鎴愭按鐨勪綋绉+鐭冲潡鐨勪綋绉)=0.1cm鍜100cm2...
绛旓細70g/m²鎰忔濆氨鏄瘡骞虫柟绫宠川閲70鍏嬨傜焊鐨勫帤搴︼細5cm/500寮=0.1mm 鎵浠ョ焊鐨勫瘑搴︿负锛氬亣璁惧彇涓骞虫柟绫 璐ㄩ噺m涓70g 浣撶НV=0.1脳0.1脳1脳10^4=100cm³瀵嗗害=70梅100=0.7g/cm³=0.7脳10³kg/m³
绛旓細100000鏉°傛牴鎹暟瀛︿腑浣撶Н杩愮畻瑙勫垯锛氶渶瑕佺煡閬10鍗囨按鐨勪綋绉互鍙婃瘡鏉￠奔鐨勪綋绉傚亣璁炬瘡鏉￠奔鐨浣撶Н涓V_cm^3锛堣繖閲屽亣璁涓0.1绔嬫柟鍘樼背锛屼絾瀹為檯鍊间笉鍚岋級銆傞偅涔堬紝10鍗囨按鐨勪綋绉负10000姣崌鎴10000绔嬫柟鍘樼背銆傚彲浠ュ吇鐨勯奔鐨勬暟閲廚涓10鍗囨按鐨勪綋绉櫎浠ユ瘡鏉￠奔鐨勪綋绉細N=10000/V_cm^3锛涘皢V_cm^3=0.1浠ｅ叆涓婂紡锛...
绛旓細鈶犵墿浣撲笂琛ㄩ潰璺濇按闈=20cm-10cm=10cm锛 鍒欑墿浣撲笂琛ㄩ潰鍙楀埌姘寸殑鍘嬪己p=蟻gh=1.0脳10 3 kg/m 3 脳9.8N/kg脳0.1m=980Pa锛 鈶℃鏂逛綋鐨浣撶Н涓锛 V 鐗 =0.1m脳0.1m脳0.1m=0.001m 3 锛 鍥犱负鐗╀綋鏄叏閮ㄦ蹈娌★紝鎵浠 鐗 =V 鎺 =0.001m 3 锛 F 娴 =蟻gV 鎺 =1.0脳10 ...
绛旓細瑙ｏ細搴曢儴锛毾脳4²脳0.1=1.6蟺cm³澹侊細蟺锛4.1²-4²锛壝20=16.2蟺cm³鈭村鍣ㄥ澹浣撶Н1.6蟺+16.2蟺=17.6蟺cm³
绛旓細1銆侀暱鏂逛綋浣撶Н涓6*4*3=72m³ 鑰屼竴涓皬姝ｆ柟浣撶殑浣撶Н涓1*1*1=1m³锛屾晠涓鍏卞彲浠ュ垎鍓叉垚72/1=72涓皬姝ｆ柟浣 闀挎柟浣撶殑琛ㄩ潰绉负2锛6*4+6*3+3*4锛=108銕 鑰屽皬姝ｆ柟浣撶殑琛ㄩ潰绉箣鍜屼负2锛1*1+1*1+1*1锛*72=432銕★紝灏忔鏂逛綋琛ㄩ潰绉箣鍜屽師闀挎柟浣撹〃闈㈢Н鐨432/108=4鍊 2銆...
绛旓細0.1绔嬫柟澶х害鏄130鍗冨厠0.1鏂规按娉ユ槸1鍏枻銆傛櫘閫氭按娉ユ瘮閲嶄负3:1,瀹归噸閫氬父閲囩敤1300鍏枻/绔嬫柟绫;鎵浠0.1绔嬫柟澶х害鏄130鍏枻銆傞噸閲忕瓑浜浣撶Н涔樹互瀵嗗害锛屾按娉ュ瘑搴︿笉鍚岀绫婚兘涓嶅悓锛岀浉鍏虫枃鐚兘鏈夋祴閲忚繃鎵ц涓崕浜烘皯鍏卞拰鍥藉浗瀹舵爣鍑嗭紝鏍囧噯鍙稧B/T208-94锛屼緥濡傛櫘閫氱閰哥洂姘存偿瀵嗗害3.0~3.15g/cm_锛屽爢绉瘑搴1~1.6g/cm...
绛旓細楸浣撶Н灏鏄姘寸殑浣撶Н銆俈=1.5脳1脳0.001=0.0015绔嬫柟绫=1.5绔嬫柟鍘樼背銆
