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1. A 200-turn coil of radius 4.0 cm and resistance 6.0 M is coaxial with solenoid of 240 turns/cm and diameter 3.6 cm. The solenoid current drops from 1.5 A to zero in the time of 25 mS. What voltage and current is induced in the coil during the time interval?

4. The critical angle for total internal reflection at a liquid - air interface is 48.6. If a ray of light traveling in the liquid has an angle of incidence at the interface of 40.0, what angle does the refracted ray in the air make with the normal? If a ray of light traveling in air has an angle of incidence at the interface of 40.0, what angle does the refracted ray in the liquid make with the normal?