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1、2013 中考物理压轴题及答案三一、36电梯为居民出入带来很大的便利，出于安全考虑，电梯都设置超载自动报警系统，其工作原理如图甲所示。已知控制电路的电源电压U6 伏，保护电阻R1100 欧，压敏电阻 R2的阻值随压力F 大小变化如图乙所示，电梯底架自重和电磁铁线圈的阻值都忽略不计。（1）当压敏电阻R2受到的压力F 增大时，其阻值减小，控制电路中的电流增大，从而使电磁铁的磁性增强。电梯超载时，衔铁被电磁铁吸住，触点K 与触点接触，电铃发出警报声。（2）若电梯在20 秒内将一位重600 牛的乘客匀速提升15 米，求电梯对乘客做功的功率。（3）当电磁铁线圈电流达到20 毫安时，衔铁刚好被吸住。若该电
2、梯厢内站立总质量为 1000 千克的乘客时，试通过计算说明电梯是否超载。（g 取 10 牛/千克）二、36小型风力发电机发出的电能首先经过蓄电池贮存起来，然后再由蓄电池向用电器供电。如图是某小型风力发电机的输出功率与风速的关系图。（1）在风速为米/秒时达到最大输出功率；（2）该风力发电机的输出功率与风速之间的关系是；（3）该风力发电机固定在水平地面上时，整个装置与地面接触的面积是1 米2，总质量为 60 千克。计算该装置对水平地面的压强多大？（4）若该风力发电机按输出功率为500 瓦发电，平均每天工作8 小时，计算一年（365 天）发电量是多少？三、33（8 分）2011 年 3 月 26 日
3、晚 8:00 9:00，岳阳与世界众多城市一起参与了“地球一小时”活动。活动倡议熄灭不必要的灯光，切断电视、电脑等电器电源，小明在活动文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T
4、8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M
5、9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I
6、2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M
7、8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:
8、CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N
9、10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8文档编码:CT5V4N10M10G6 HT3T8D5R2M9 ZA7I2J7Y1M8宣传中了解到：只要电源插头没有拔掉
10、，在待机状态下，每台电脑的功率为5.8W，每台电视机的功率为8.2W。（1）小明所在小区有100 台电脑和 100 台电视机，若再活动中均由原来的待机状态改为切断电源1 小时，此举一共可节约电能多少焦耳。（2）节约电能完全被水吸收，能使多少千克20的水升高到60？【c水=4.2103J/(kg?)】（3）标有“220V1000W”的电热水器正常工作，将与（2）问中质量相同的水升高相同的温度，需要100min，该电热器的效率是多少？若用电高峰期，若此电热器的实际电压仅为 200V，它的实际功率为多大?（电热器的电阻恒定，结果只保留一位小数）四、24、图甲是内胆为铝质材料的电饭锅，内部电路如图乙所
11、示，R1是加热电阻，阻值为 48.4；R2是限流电阻，阻值为484。煮饭时，接通电源（220V50Hz），闭合手动开关S1，电饭锅处在加热状态。当锅内食物温度达到103时，开关 S1会自动断开，断开后若无外力作用则不会自动闭合，S2是一个自动温控开关，当锅内食物温度达到80时会自动断开，温度低于70时会自动闭合。（已知水的比热容为4.2 103J/(kg.);查表可知铝的熔点为660）请解答下列问题：（1）如果接通电源后没有放入食物就闭合开关S1，电饭锅的内胆是否会熔化？为什么？（2）在保温和加热两种情况下，电饭锅消耗的电功率之比是多少？文档编码:CP3P7A8L10D1 HZ2B10G8B6
12、V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7
13、Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5
14、K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码
15、:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7
16、A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D
17、1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B
18、10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8（3）若在一个标准大气压下将温度为20，质量为 2.5kg 的水烧开需要16min40s，求电饭锅正常工作时电能转化为内能的效率是多少？25、图是某车站厕所的自动冲水装置，圆柱体浮筒A的底面积为400cm2，高为 0.2m，
19、盖片 B 的面积为 60cm2（盖片 B的质量，厚度不计）。连接AB是长为 0.3m，体积和质量都不计的硬杆。当流进水箱的水刚好浸没浮筒A时，盖片 B 被撇开，水通过排水管流出冲洗厕所。（已知水的密度为1103kg/m3,g=10N/kg）请解答下列问题：（1）当水箱的水刚好浸没浮筒A时，水对盖片B的压力是多少？（2）浮筒 A的重力是多少？（3）水箱中水多深时盖片B又自动关上？五、专题五：综合计算(本专题满分9 分，共 2 个小题，第 10 小题 4 分，第 11 小题 5 分)10在如图所示的电路中，电流表的量程为00.6A，电压表的最程为03V，R34。求(画出相应的等效电路图)：(1)只
20、闭合开关S1时，电路消耗的功率为4W，则电源电压U=?文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2
21、B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B
22、6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP
23、7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A
24、5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编
25、码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P
26、7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8(2)只闭合开关 S2时，灯泡 R,1正常发光，R3消耗的功率为0.64W，则灯泡的电阻R1=?(写出该小题的解题
27、思路后再求解)(3)只闭合开 S3时，在不损坏电流表、电压表和灯泡的情况下，则变阻器 R2的取值范围是多少?11有一根绳子，通过如图甲所示的滑轮组，能够提起的最重物体是A，物体再重绳子将断裂(不计绳重和摩擦)。求：(1)将 A匀速提高 2m做的有用功为740J，则物重 GA=?(2)若此时滑轮组机械效率为92.5%，人的体重为600N，每只脚与地面接触面积为2l02m2，则人对地面的压强p地=?(3)若用这根绳子和这些滑轮，组成图乙所示滑轮组，利用它从水中缓慢匀速提起(不计水的阻力)一个边长为3l0 1m的正方体 B，当提到 B 的下表面所受水的压强为2l03Pa时,绳子断裂。则正方体B 的密
28、度B=?六、38.(8 分）在图 13 所示的电路中，设电源电压不变，灯泡L 上标有“6V,3W”字样，当 K1闭合，单刀双掷开关K2接 a 时，灯泡 L 正常发光；当K1断开，单刀双掷开关K2接 b 时，电压表示数为3V。（设灯丝的电阻不变）求：(l）电源电压是多少伏？文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6
29、A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档
30、编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3
31、P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L1
32、0D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ
33、2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8
34、B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 Z
35、P7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8(2）电阻 R 的阻值是多少欧？(3)K1断开，K2接 b 时，该灯泡L 在 1 分钟内消耗的电能为多少焦耳？39(12 分）据报道，我市某水库库底是一座旧城遗址，目前正在进行试探性发掘和打捞。某次试探性打捞作业时，用绳子将实心物体从水面下12m 深处沿竖直方向匀速提升到离水面1.5m 深处的过程所用时间为42s，拉力 F 做功的功率为90W。当物体被拉到有 4/5 的体积露出水面时，让其静止，此时绳子的拉力F=520N。不计绳子的重力和水的阻力。（水的密度0=1.0103kg/m3,g=1
36、0N/kg)求：(l）物体从水面下12m 深处匀速上升到离水面1.5m 深处的过程中，物体匀速运动的速度 v；(2）物体在水面下方匀速上升过程中绳子的拉力F;(3）物体浸没在水中时所受的浮力F浮;(4）物体的密度物。七、文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B
37、10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6
38、V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7
39、Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5
40、K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码
41、:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7
42、A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D
43、1 HZ2B10G8B6V9 ZP7Z4L6A5K824(7分)某工厂产品计数装置的示意图如图7甲所示。P为激光源，R1为光敏电阻(有光照射时，阻值变小)，a、b两端接“示波器”(示波器对电路无影响)，定值电阻R2为400，电源电压为 6V。水平传送带匀速运动，每当传送带上的产品通过激光束时，激光束会被产品挡住，示波器荧光屏上显示的R1两端电压与时间的关系图象如图7乙所示。试求：(1)激光照射R1时，R1的阻值是多少?(2)激光被产品挡住时，R1、R2消耗的总功率是多少?(3)从0时开始计时，经过1min，传送带上通过计数装置的产品是多少个?文档编码:CP3P7A8L10D1 HZ2B10G8
44、B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 Z
45、P7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6
46、A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档
47、编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3
48、P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L1
49、0D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ
50、2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8文档编码:CP3P7A8L10D1 HZ2B10G8B6V9 ZP7Z4L6A5K8中考物理压轴题计算题解析一、36答案：（1）B（2）W FsGh 600N15m 9000J W450s20J9000tWP（3）方法一G mg 1000kg10N/kg10000N U1IR10.02A1002V 20