An object is moving very fast perpendicularly to your line of sight. What shift will you observe in its spectrum?
A. no shift
B. red shift
C. yellow shift
D. blue shift
Answer: A
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In lifting an object, work is done against ______________
Fill in the blank(s) with correct word
Thermal Expansion: The coefficient of linear expansion of steel is 12 × 10-6 K-1. What is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 K from winter to summer?
A. 1.2 cm B. 1.4 cm C. 1.6 cm D. 1.8 cm E. 2.0 cm
Which of the following statements are true for the Bohr model of the atom? (There could be more than one correct choice.)
A) The spacing between all the electron shells is the same. B) The energy difference between all the electron shells is the same. C) As we look at higher and higher electron shells, they get closer and closer together, but the difference in energy between them gets greater and greater. D) As we look at higher and higher electron shells, they get farther and farther apart, but the difference in energy between them gets smaller and smaller. E) There is no general pattern in the spacing of the shells or their energy differences.
Series/Parallel Circuits: If emf of the ideal battery is V = 4.0 V, what is the current through R6 for the circuit shown in the figure?
A. 0.0077 A B. 0.017 A C. 0.040 A D. 4.0 A