On Venus,__________are large round geological faults in the crust caused by the intrusion of magma below the crust
A) multiringed basins
B) micrometeorites
C) magma oceans
D) coronae
D
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Current: When a current flows through an ionic liquid such as salty water, the moving charges are
A. only protons. B. only electrons. C. only negative ions. D. only positive ions. E. both positive and negative ions.
What happens to energy in the Sun's convection zone?
A) Energy is transported outward by the rising of hot plasma and sinking of cooler plasma. B) Energy is produced in the convection zone by thermal radiation. C) Energy slowly leaks outward through the radiative diffusion of photons that repeatedly bounce off ions and electrons. D) Energy is produced in the convection zone by nuclear fusion.
If a man says to you that he is absolutely certain of some idea, you can conclude that
A) if his idea really is absolutely true then it must be based on scientific reasoning. B) he is wrong. C) he is right. D) he is a fanatic. E) he is not being scientific.
An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 1000-m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25 b. 0.50 c. 1.00 d. 2.00 e. 4.00