Which of the following is characteristic of a nuclear reaction?

i. electrons in atomic orbitals are involved in the breaking and forming of bonds

ii. elements are converted from one to another

iii. reaction rates are typically not affected by catalysts

iv. atoms are rearranged by the breaking and forming of chemical bonds

a. i and ii

b. i, ii, and iii

c. ill and iv

d. ii and iii

e. i, ii, iii and iv

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

First to answer will be the brainliest i need the answer asap

The center of a long frictionless rod is pivoted at the origin, and the rod is forced to rotate in a vertical plane with constant angular velocity \omega. write down the lagrangian for a bead of mass m threaded on the rod, using r as your generalized coordinate, where r, \phi are the polar coordinates of the bead. (notice that \phi is not an independent variable since it is fixed by the rotation of the rod tobe \phi = \omega * t) solve lagrange's equation for r(t). what happens if the bead is initially at rest at the origin? if it is released from any point ro > 0, show that r(t) eventually grows exponentially. explain your results in terms of the centrifugal force m* \omega ^2 *r.