荷电为Z1e和Z2e的两个粒子的Coulomb散射,V(r)=Z1Z2e2/r,在Born近似下,散射振幅为 (1)
荷电为Z1e和Z2e的两个粒子的Coulomb散射,V(r)=Z1Z2e2/r,在Born近似下,散射振幅为
(1)
荷电为Z1e和Z2e的两个粒子的Coulomb散射,V(r)=Z1Z2e2/r,在Born近似下,散射振幅为
(1)
是否有质量为零的荷电粒子?(2)是否有质量不为零的无电荷粒子?(3)不参与强作用的最重的粒子是什么粒子?(4)参与强作用的最轻的粒子是什么粒子?
A.为物体添加弹簧时,弹簧的两个端点钟必须有一个端点是粒子或是柔体的粒子
B. 为物体添加弹簧时,弹簧的两个端点钟必须有一个端点是柔体的粒子
C. 如果一端不是粒子,则弹簧不影响该端点的运动,但是该端点的运动影响弹簧
D. 可以在物体的指定组元间创建弹簧
E.可以创建已发射粒子的弹簧
A.光波长路由
B.光突发交换
C.光分组交换
D.OXC/OADM
下列不属于影响混悬液稳定性因素的是
A、微粒荷电与水化
B、混悬微粒的沉降
C、微粒成长与晶型的转变
D、絮凝与反絮凝
E、微粒的溶解度
Dawson was dissatisfied with soft iron pitons because ______.
A.they were too soft to bear the climber's weight
B.they were the only pitons he could afford to buy
C.they coul not last long
D.they were made of iron
A.4/9
B.2/9
C.1/9
D.0
When Rulon won the Olympics, ______.
A.some of his family watching
B.none of his family could afford to go
C.the people of Alton had no televisions to watch
D.his family was working on the farm