Categorize of flexibility

Which branches of natural science include the study of an organism that lived 10 million years ago

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?