A beam of light passes from one medium into the air (second medium). Angle1 (angle of incidence) is 30°. Angle 2 (angle of refraction) is 48°. Calculate the refractive index of the original medium. (ROUND TO THE NEAREST HUNDREDTH)

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

Select the correct answer. wax is a nonpolar substance. in which type of substance is it the most soluble?