g A beam of light is traveling inside a solid glass cube that has index of refraction 1.68. It strikes the surface of the cube from the inside. Part A If the cube is in air, at what minimum angle with the normal inside the glass will this light not enter the air at this surface?

This is the substance(s) formed in a chemical reaction.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final