A measurement establishes the position of a proton with an accuracy of 1.00 Í10-11 m. The uncertainty in the proton’s position 1.00 s later is ( )
举一反三
- According to the Uncertainty Principle,______ . A: it was theoretically possible to predict the future from Newton's laws B: it was not theoretically possible to know the present from Newton's laws C: there is no limit to the product of the uncertainty in a particle's position and the uncertainty in its momentum D: the more accurately one is able to define the position of a particle, the more certain he feels about its momentum
- 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?
- The mass of a proton is ( )
- Let's not talk about it now. I'm not in the __________. A: position B: usiness C: action D: mood
- 45. A navigator fixing a vessel's position by radar ______.