Air or vacuum: 1.00 Barium glass: 1.60 Water: 1.33 Flint glass: 1.70 CR39: 1.498 Polycarbonate: 1.586 Crown Glass: 1.523 Diamond: 2.45 2. A light ray moving through CR39 at an angle of 49 degrees exits into another medium at an angle of 27.48 degrees. What is the refractive index of the second medium? What is this medium? (5 marks) n = n2= sino = sine, T ​

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.