The composition of Mercury's crust is:
A) deficient in volatile compounds that contain elements such as sulfur and potassium.
B) consistent with material from the solar wind, indicating that Mercury has collected material over the last few billion years.
C) similar to the crust of the other terrestrial planets.
D) nearly identical to Mercury's mantle material.
C
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Dimensional Analysis: The period P of oscillation of a pendulum (the time interval needed to complete one full oscillation) can be expressed in terms of the mass m of the plumb bob, the length L of the string, and the acceleration due to gravity, g, as P =kmbLcgd, where k, b, c, and d are dimensionless constants. What must be the values of b, c, and d?
What will be an ideal response?
The ability to instantaneously distribute and share content widely is the web's ______ advantage.
A. currency B. connectivity C. interactivity D. delivery
The primary of an ideal transformer has 100 turns and its secondary has 200 turns. Neglecting frictional losses, if the power input to the primary is 100 W, we can expect the power output of the secondary to be
A) 100 W. B) 50 W. C) 200 W. D) none of the given answers.
The hydroturbine shown accepts water at 4 MPa and exits to the atmosphere. If the flow rate is 2 m^3/s, the maximum power output is nearest:
(A) 80 MW
(B) 70 MW
(C) 60 MW
(D) 50 MW