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01.物理高手进来啊（高一）
1）水平方向受力平衡f=F*cos37=(200*0.8)N=160N2) 竖直方向受力平衡N+F*sin37=mgN=(760-200*0.6)N=640Nf=μN μ=160/640=0.25...查看完整版>>物理高手进来啊（高一）02.想要分的进来!!!!!!!高一物理
解: h=l/2=0.5(m) 选小球的最初点为零势能点. 依题意有: 小球最初的能量为:m*v*v/2=2*4*4/2=16(j)(势能为零) 小球在最高点的能量:m*g*h=2*10*0.5=10(j)(动能为零) 小球在上滑过程中消耗的能量为16-10=6j...查看完整版>>想要分的进来!!!!!!!高一物理03.高一化学...急急急.......化学高手进来....10点前结束.
1 标况下,将VLA气体的量是V/22.4,他的质量是VM/22.40.1LH2O的质量是=1.0g/cm3*100=100g所以溶液质量=VM/22.4+100溶液体积=(VM/22.4+100)/d溶液的物质的量浓度=A物质的量/溶液体积=(V/22.4)/[(VM/22.4+100)/d]2 200mL...查看完整版>>高一化学...急急急.......化学高手进来....10点前结束.04.高一英语高手进来了
1 A dictionary is a book that you can use to learn more words. A dictionary is a book which you can use to learn more words. 2 Xiao Ming works in a shop which sells photo cameras. Xiao Ming works in...查看完整版>>高一英语高手进来了05.高一英语高手进来了
1,The soldiers have saved the people who were in danger. The people who have been saved by the soldiers were in danger before.2,The waiter who served us tea was very friendly and polite. The waiter ...查看完整版>>高一英语高手进来了06.高一英语高手进来了
The road which has now been built stronger was destroyed in the earthquake.The road which was destroyed in the earthquake has now been built stronger....查看完整版>>高一英语高手进来了07.高一化学-高手进来
1.同上啦~十字交叉~,具体如下:1)CO2 44 4 \ / 32 n(CO2)/n(CO)=4/12=1/3 / \CO 28 122)n总＝m总／M（平均质量）=64/32=2moln(CO2)+n(CO)=2mol①n(CO2)/n(CO)=1/3②解出n(CO2)=0.5mol...查看完整版>>高一化学-高手进来08.高手在哪？一道高一物理题
1.动量守恒0.02*500=2V+0.02*100V=4m/s2.机械能守恒1/2*0.02*500^2-1/2*0.02*100^2-1/2*2*4^2=2384j...查看完整版>>高手在哪？一道高一物理题09.高手在哪？一道高一物理题
解:1.将子弹和木块看成一个系统,那么此系统受到的外力为0,所以根据动量守恒可得,0.02*500=0.02*100+2*v木,解得v木=4m/s2.此过程中木块与子弹组成的系统损失的机械能为前后动能的差值,即ΔE=1/2 *0.02*500^2-1/2 *0.0...查看完整版>>高手在哪？一道高一物理题10.高一物理题，高手帮忙
1）假设加速度为a,时间为t,由初速度为0的匀加速直线运动规则，有，s=(at^2)/2,所以s1:s2:s3=(at1^2)/2:(at2^2)/2:(at3^2)/2=1;2;3t1:t2:t3=1：根号2：根号3平均速度为二分一的初速度与末速度的和，v=at前1M的平均速度...查看完整版>>高一物理题，高手帮忙

 

 

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