In a certain material, a beam of monochromatic light (f=5.09 × 10^14 Hz) has a speed of 2.04× 10^8 meters per second. The material could be Question 14 options:

crown glass (n=1.52)

flint glass (n=1.66)

glycerol (n=1.47)

water (n=1.33)

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.

Many science fiction movies and tv shows have detected using a nuclear weapon to destroy astroids what problems does plait see with this plan