Define the refraction index of a medium..
whatt do you mean by the
that the critical angle
glass is 42°​

Why is the use of carbon-14 limited

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.