A light ray in air is incident on an air to glass interface at an angle of 45° and is refracted at an angle of 30° to the normal. What is the index of refraction of the glass?
A)
1.23
B)
1.31
C)
1.41
D)
1.52
E)
1.74
C
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When a load is placed on the middle of a horizontal beam supported at each end, the bottom part of the beam undergoes
A) tension. B) compression. C) either of these D) none of these
A newton is larger than a pound
a. True b. False Indicate whether the statement is true or false
As long as there is ice in your drink, the temperature of the ice remains near
a. room temperature. b. the temperature of the drink. c. zero Celsius. d. zero Fahrenheit.
An electron is released from rest at the negative plate of a parallel-plate capacitor. If the distance across the plate is 2.0 mm and the potential difference across the plate is 6.0 V, with what velocity does the electron hit the positive plate? (me = 9.1 × 10^?31 kg, e = 1.6 × 10^?19 C)
a. 2.1E+5 m/s b. 1.5E+12 m/s c. 5.3E+5 m/s d. 1.5E+6 m/s e. 2.1E+6 m/s