What is so fragile that just saying its name breaks it?

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

What is the single most important equation in all of physics?

Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. a-if a bearing needs 4.0 s to solidify enough for impact, how high must the tower be? b- what is the bearing's impact velocity?