When light passes from water to plastic at angle of incidence 30°, it refracts at an angle of 22°. If the index of refraction for water =1.33, calculate the index of refraction for plastic.

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

Suppose that recording station n is located 200 km north of the epicenter of an earthquake, and recording station s is located 100 km south of the epicenter of the same earthquake. which of the following statements would be true?

Which type of wave can travel without a medium