When light goes from a material with a lower index of refraction n1 into a material with a higher index of refraction n2 with an angle of incidence of 
which of the following is true?
A. the angle of refraction is more than
B. the angle of refraction is less than
C. total internal reflection may occur
D. the angle of refraction is more than
and total internal reflection may occur
E. the angle of refraction is less than
and total internal reflection may occur
B. the angle of refraction is less than
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On the planet Venus, a Venusian picks up a stone and drops it into a deep hole. If it falls 3 m in 1 second, how far will it fall in 2 seconds? You can neglect Venusian air resistance
A) 15 m B) 6 m C) 9 m D) 20 m E) 12 m
A solid object is made of two materials, one material having density of 2000 kg/m3 and the other having density of 8000 kg/m3 . If the object contains equal volumes of the materials, what is its average density?
a. 3000 kg/m3 c. 5000 kg/m3 b. 3200 kg/m3 d. more information is needed
A transformer consists of a 500-turn primary coil and a 2000-turn secondary coil. If the current in the secondary is 3.0 A, what is the current in the primary?
A) 0.75 A B) 1.3 A C) 12 A D) 24 A E) 48 A
If Earth had twice its present mass but it orbited at the same distance from the sun as it does now, its orbital period would be
A) 4 years. B) 3 years. C) 2 years. D) 1 year. E) 6 months.