A painting looks less flat when viewed with
A) one eye.
B) both eyes.
C) Polaroid glasses.
Answer: A
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If the momentum of a ball is doubled, then the kinetic energy is
A. 0.5 times larger. B. 2 times larger. C. 3 times larger. D. 4 times larger. E. 5 times larger.
The thermal conductivity of aluminum is 238 W / m •°C and of copper is 397 W / m •°C. A rod of each material is used as a heat conductor. If the rods have the same geometry and are used between the same temperature differences for the same time interval, what is the ratio of the heat transferred by the aluminum to the heat transferred by the copper?
a. 0.599 c. 0.359 b. 1.67 d. 2.78
Which object has zero acceleration?
A) one at rest B) one moving at constant velocity C) one in mechanical equilibrium D) all of the above E) none of the above
An SBc galaxy in the Hubble classification system would have...
A. a barred spiral shape with tight arms. B. a spiral shape with tight arms. C. a barred spiral shape with loose arms. D. an elliptical shape with a medium elongation.