Light of wavelength 535.00 nm is incident normally on a diffraction grating, and the second‑order maximum is observed to be 19.0∘ from the normal. How many slits per millimeter are marked on the grating?

An object is moving east, and it’s velocity changes from 65m/s to 25m/s in 10 seconds. which describes the acceleration?

Mga halaman/punong ornamental na di namumulaklak

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.