Rays of light incident on a lens and parallel to the principal axis of the lens converge

a. at the focal point of the lens.
b. in front of the lens.
c. in back of the lens.
d. at the center of curvature of the lens.

Most short-period comets do not have randomly oriented orbits because

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).

Bahan yang digunakan mencegah terjadinya polarisasi pada batu baterai a.larutan h2so4b.mncl2 dan serbuk karbonc.pbso4d.nh4cl