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 ​

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

If forces acting on an object are unbalanced. true or false

The solid that is formed and usually sinks to the bottom of a solution is the