一飞轮以每分钟1500转的转速转动，受制动50秒后静止。则从制动开始到静止飞轮转过的转数为___A flywheel rotates at a speed of 1500 revolutions per minute and stops after being braked for 50 seconds. The number of revolutions from the start of braking to the rotation of stationary flywheel is ___
A: [img=42x24]18034cb7a5a9a82.jpg[/img]0 review
B: [img=51x17]18034cb7b045f58.jpg[/img]625 reviews
C: [img=51x21]18034cb7bbb4c21.jpg[/img]750 reviews
D: [img=54x16]18034cb7c642f4d.jpg[/img]1500 reviews
A: [img=42x24]18034cb7a5a9a82.jpg[/img]0 review
B: [img=51x17]18034cb7b045f58.jpg[/img]625 reviews
C: [img=51x21]18034cb7bbb4c21.jpg[/img]750 reviews
D: [img=54x16]18034cb7c642f4d.jpg[/img]1500 reviews
举一反三
- 设X，Y为两个随机变量，且[img=179x25]1803395d555effc.png[/img] , [img=226x25]1803395d61f1a43.png[/img] ,则[img=143x25]1803395d6f00057.png[/img]= ( )． A: 1/7 B: 3/7 C: 4/7 D: 5/7
- 半径为30cm的飞轮，从静止开始以0.5rad[img=26x22]1803e18415aa258.png[/img]的匀角加速转动，则飞轮边缘一点在飞轮转过[img=34x20]1803e1841e49e79.png[/img]时的切向加速度[img=16x17]1803e18426a7c0b.png[/img]=_________.
- 半径为30cm的飞轮，从静止开始以0.5rad[img=26x22]1803e07f9e568fd.png[/img]的匀角加速转动，则飞轮边缘一点在飞轮转过[img=34x20]1803e07fa65cabc.png[/img]时的切向加速度[img=16x17]1803e07fadb454d.png[/img]=_________.
- 半径为30cm的飞轮，从静止开始以0.5rad[img=26x22]1803e082a7ea052.png[/img]的匀角加速转动，则飞轮边缘一点在飞轮转过[img=34x20]1803e082b0bc9d0.png[/img]时的切向加速度[img=16x17]1803e082ba4b82b.png[/img]=_________.
- 半径为30cm的飞轮，从静止开始以0.5rad[img=26x22]180342fe3267c93.png[/img]的匀角加速转动，则飞轮边缘一点在飞轮转过[img=34x20]180342fe3ac1641.png[/img]时的切向加速度[img=16x17]180342fe4315c8b.png[/img]=_________.