Light enters a piece of glass from air at an angle of 20o. It refracts at an angle of 14o. Find the index of refraction of the glass.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Acaterpillar tries to climb straight up a wall a meter high, but for every 2 cm up it climbs, it slides down 1 cm. eventually, it reaches the top. when it reaches the top, it does not pull itself over so it will slide down 1 cm. what is the total displacement traveled?

Observations show that interstellar clouds can have almost any shape and