1. Charges of 3.00 nC, –2.00 nC, –7.00 nC, and 1.00 nC are contained inside a rectangular box with length 1.00 m, width 2.00 m, and height 2.50 m. Outside the box are charges of 1.00 nC and 4.00 nC. What is the electric flux through the surface of the box?
举一反三
- Mộttuầncómấyngày?Mộttuầncóngày. A: ba B: bảy C: tám D: năm
- 在下列五个物理量中: (1) (¶V/¶nB)T,p nc≠b (2) (¶mB/¶nB)T,p nc≠b (3) (¶H/¶nB)s,p, nc≠b (4) (¶F/¶nB)T,p, nc≠b (5) (¶G/¶nB)T,p, nc≠b
- 质量级别分为() A: NUC、ISO、NC级 B: Q1、Q2、Q3、NC级 C: RCCM1、RCCM2、RCCM3、NC级 D: 1、2、3
- NC加工程序是NC机床自动加工零件的( )。
- 危险”的正确读音是_________________。 A: yīncíwéixiǎn B: yīncǐwéixiǎn C: yīncǐwēixiǎn D: yīncíwēixiǎn