Of all the chemical elements, the one most crucial to the complexity of life is:
A) hydrogen.
B) oxygen.
C) sulfur.
D) carbon.
E) nitrogen.
D
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Proportional Reasoning: Two identical objects A and B fall from rest from different heights to the ground. If object B takes twice as long as object A to reach the ground, what is the ratio of the heights from which A and B fell? Neglect air resistance.
A. hA/hB = 1/
B. hA/hB = 1/2
C. hA/hB = 1/4
D. hA/hB = 1/8
The Other Frame is moving in the +x direction with x-velocity ? = 0.25 with respect to the Home Frame. The two-observer space time diagram in figure R5.9 shows the diagram t and x axes of the Home Frame and the diagram t? axis of the Other Frame. Which of the choices in that figure would best correspond to the diagram x? axis if the Newtonian concept of time were true?
How is the magnification, mo, of the objective lens in a microscope related to the focal length, fo, of the lens?
A. Amo= -1/fo B. mo= -fo/L C. mo= -L/fo D. mo= L - fo
A wave pulse traveling to the right along a thin cord reaches a discontinuity where the rope becomes thinner and lighter. What is the orientation of the reflected and transmitted pulses?
A) both are right side up B) the reflected pulse returns right side up while the transmitted pulse is inverted C) the reflected pulse returns inverted while the transmitted pulse is right side up D) both are inverted E) It is impossible to predict.