10. Find the critical angle for an ethyl alcohol-air boundary if the indes of refraction of ethyl alcohol is 1.361.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.