What does Snell's law states and deduce a graph of the refractive index of the glass n​

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

Convection occurs when thermal energy is transferred by the movement of

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