A ray of laser light strikes a glass surface at an angle Θa = 25.0˚ to the normal and it is refracted to an angle Θb = 18.5˚ to the normal. What is the index of refraction nb for this type of glass? Na= 1.00

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

What happens to an isotope during radioactive decay?