ܸݲõó´ܶp=________
(5)(4)еʵƽͬѧָʵƴڲ֮ǣУձװҺ壬
(6)ʵʱ֣ƽһȱǣ_______ ѡƫƫСȻȷ
20ʵ顰̽ɡʵʱʹõ15cm
1ͼʾҷֱ˵_____ȷĸ Aĵͬһֱ Bĵͬһ߶
2̶50cm̶λã̶15cm̶λʱӦ_____ѡƶڹϵõõֻλöԵĴС_____ѡС䡱
3ԼĽ۾֮䣬ֹϵģ壬Ӧ_____ƶѡԶ롱ٴεõʵʱ_____ѡС
4ȼձʱ֮_____ѡ½
5ʱijͬѧżȻϿijԭǹ_____ֱߴ䡱䡱
21ͼС̽ƽ澵ص㡱龰·һŰɫķֽ洹ֱͬABڲİֽϣAΪ塣
1òƽ澵ʵ飬ô_____ΪʹɵֵͲ_____A/B䡣
2Aӹ̶СĵƶBӣֱAӵ_____Ϊֹɴ˿ԵóĽ_____ 3һ۲ABڷֽϵλ÷֣ﵽľ_____AԶ벣壬ĴС_____/С/䣩
4СʵУòOOᣨĽӴ֣ˮƽƶ־еA_____ƶ//ֽOOתԼ־е_____תԼ/תԼ/ 22̽ˮڹ̵ʵ飺 ʱ/min ˮ¶/ 0 90 1 __ 2 94 3 96 4 98 5 98 6 98 7 98 8 98 1minˮ¶ͼʾ뽫ϱСʵҳõ¶ȼǸҺ_____ĹƳɵġ¶ȼƲܵھúϸͬ£Һĸ߶ȱ仯õĿѧ_____
ݱеϢѹ£֪ʵӦѡ_____ ѡƾˮ¶ȼơˮʱ¶_____ ƾ ˮ 23̽ԣ ͼѵ߽ϣˣֳͬʱעֳĿıֳijȣʵ顣ʵ鷢֣_____ֳԽ_____ԽԽ_____
ͼһô棬淢ȱ_____ͬʱ۲쵽ƹøԶ˵뷢_____йء
̵/ 117 39 е/ 78 357
24СڡСƽٶȡʵУͼʾʵװãСӴ̶ȣֵֶΪ1 mmб涥ɾֹ»ͼеķСABCʱӱʾ
1ʵǸݹʽ__________вġ
2ʵΪ˷ʱӦʹб¶Ƚ__________С
3ͼϢشsAC=__________cmtBC=__________svAC=__________m/s
4ʵǰѧʹõӱСAſʼʱʹACεƽٶvACƫ__________С ο𰸡 һѡ
1 2 3 4 5 6 7 8 9 10 D C D A B A B B A B 11С
12 ڶ 13 2 14 ۻ 15ֱdB 162.7103
171810m20.45kg30.910kg/m 1890km/h 0.75h ġʵ
19BCA 2.6 ƽձͳ´m mm0ˮ/m1m0 Ȼȷ
20B Զ С
21ȷλ A ȫغ ȴ תԼ 22 Ŵ ˮ 23Ƶ ǿ
24v=s/t С 10.00 1 0.0333
-43
3
3
2019-2020ѧĩԾ
һѡ
1ͼʾˮƽ̨һ㹻Ϊ40cm2ıԲװΪ20cmˮֽΪ10cm2Ϊ20cmԲAϸߣ㹻ڹ̶ĵɲ¶ˣʹAˮУȶA±ˮ4cmɲƵʾΪ1. 2Nڴ˻ϣʹ̨ĹУg=10N/kgˮܶΪ1.0 103kg/m3жȷ
AԲAΪ1.2N
BԲAܶΪ0.810kg/m
CԲA±ˮ4cmʱˮײѹǿΪ2.3103Pa D̨ĸ߶ȵˮĸ߶
2סʵmVĹϵͼͼʾͼ֪
3
3
Aʱ Bʱҵ Cܶȱҵܶȴ DܶΪ0.510kg/m
3ͼʾACΪߣCBΪߡAO?OB֪OA?8cmĽ
3
3
Af?4cm Bf?6cm Cf?8cm Df?9cm
4ͼʾڹķγɵǣ
AŴġ㡱 BǽϵӰ CˮеĵӰ DIJʺ