Abeam of electrons with energy 250 me v is elastically scattered through an angle of 10° by a heavy nucleus that is at rest. it is found that the differential cross-section is 65% of that expected for scattering from a point-nucleus. estimate the root mean square radius of the nucleus. neglect the recoil of the nucleus and use the rest mass of the electron as 0.511 mev/c

Hydrogen and helium are both members of?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)