作业帮Why are two balls connected by a spring a good model for two atoms connected by a chemical bond?A.If the two atoms get closer together than the equilibrium interatomic distance,they repel each other.B.If the two atoms get farther apart than the equil
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Why are two balls connected by a spring a good model for two atoms connected by a chemical bond?A.If the two atoms get closer together than the equilibrium interatomic distance,they repel each other.B.If the two atoms get farther apart than the equil
Why are two balls connected by a spring a good model for two atoms connected by a chemical bond?
A.If the two atoms get closer together than the equilibrium interatomic distance,they repel each other.
B.If the two atoms get farther apart than the equilibrium interatomic distance,they attract each other.
C.Each spring represents a real microscopic coiled metal wire that connects two adjacent atoms.
D.The magnitude of the force one atom exerts on another is proportional to the stretch or compression of the bond between them.
已知选A+B,A+B+C,A+B+C+D,C+D,C,D这样选择都不对.给理由.
Why are two balls connected by a spring a good model for two atoms connected by a chemical bond?A.If the two atoms get closer together than the equilibrium interatomic distance,they repel each other.B.If the two atoms get farther apart than the equil
a是正确的,两原子太接近即遭受排斥
b是正确的,理由与上面类似,太远即吸回来
c是错误的,弹簧不能代表真实存在的化学键
d是正确的,所受力的大小与弹簧被拉伸或者压缩成正比,f=kx,x为型变量
这个题目虽然看似和化学联系起来,实际上考查的还是物理上面关于弹簧的知识.
根据能量守恒定律下落前的能量=0.5mv0^2 mgh 下落后的能量=0.5mv^2 0.5mv0^2=0.5mv^2-mgh 下落过程是势能转变为动能的过程。最大弹性势能就是
对不起，我不懂英语
A正确 理由很简单 小于那个临界距离 就会是斥力
B错误 若距离太远 吸引力也可视为零 因为吸引力的大小是随着距离的增大 先增大 后减小的
C 错 不能代替
D错 力的大小与 距离不成正比 对斥力而言 是反相关 对引力而言是先正相关 后反相关 斥力和引力与 距离是不存在 正比反比的...
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A正确 理由很简单 小于那个临界距离 就会是斥力
B错误 若距离太远 吸引力也可视为零 因为吸引力的大小是随着距离的增大 先增大 后减小的
C 错 不能代替
D错 力的大小与 距离不成正比 对斥力而言 是反相关 对引力而言是先正相关 后反相关 斥力和引力与 距离是不存在 正比反比的
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