设弹簧的原长为l0,弹簧刚度系数为k,物块由M1运动至M2 ,弹性力的功为 。http://edu-image.nosdn.127.net/75D3E3E535F3D8AEBA42DE2FE4B0BEBA.png?imageView&thumbnail=520x520&quality=100
举一反三
- 质量为 m 的物体和劲度系数为 k、原长为 L0 的均匀弹簧组成弹簧振子,弹簧的质量 m’ 较小,但又不能忽略。此弹簧振子自由振动的周期为( ) A: T = 2π[(m + m’)/k]1/2 B: T = 2π[(m + m’/2)/k]1/2 C: T = 2π[(m + m’/3)/k]1/2 D: T = 2π[(m + m’/6)/k]1/2
- 对于多电子原子核外电子,下列四组给定量子数的轨道的能量高低顺序为()。 (1)n=3,l=0,m=0,ms=+1/2 (2)n=3,l=2,m=2,ms=-1/2 (3)n=1,l=0,m=0,ms=-1/2 (4)n=2,l=0,m=1,ms=+1/2 A: (2)>(1)>(4)>(3) B: (1)>(2)>(4)>(3) C: (1)>(2)>(3)>(4) D: (3)>(4)>(1)>(2)
- <img src="http://edu-image.nosdn.127.net/71A448760C52ECDFD18872E9B72EDB68.PNG?imageView&thumbnail=520x520&quality=100" />? 0<br >|1<br >|2<br >|3<br >
- 下列各组量子数中正确的是 A: n = 3,l = 1,m = -1 B: n = 2,l = 2,m = 0 C: n = 2,l = 0,m = -1 D: n = 2,l = 3,m = 0 E: n = 1,l = 2,m = 1 F: n = 4,l = 0,m =1
- 在下列六组量子数中,正确的是① n=3,l= 1,m=-1 ② n = 3,l= 0,m = 0③ n = 2,l= 2 ,m=-1 ④ n = 2, l = 1 ,m = 0 ⑤ n = 2,l = 0,m =-1 ⑥ n= 2,l = 3 , m= 2 A: (1),(2),(4) B: (2),(4),(6) C: (1),(2),(3) D: (1),(3),(5)