m (g) | 5.0 | 10.0 | 15.0 | 20.0 | 25.0 | 30.0 |
T (s) | 0.40 | 0.57 | 0.69 | 0.80 | 0.89 | 0.98 |
m (g) | 5.0 | 10.0 | 15.0 | 20.0 | 25.0 | 30.0 |
T (s) | 0.40 | 0.57 | 0.69 | 0.80 | 0.89 | 0.98 |
T2(s2) | 0.16 | 0.32 | 0.48 | 0.64 | 0.79 | 0.96 |
A.把电火花计时器固定在桌子上 |
B.安好纸带 |
C.松开纸带让物体带着纸带运动 |
D.接通220V交流电源 |
© 2017-2019 超级试练试题库,All Rights Reserved.