Large, smooth, dark plains on the moon are called ____
a. ejecta blanket
b. central peak
c. maria
d. multiringed basin
e. Sinuous rilles
c
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Radio telescopes which use dishes to gather radio waves are _______ telescopes
a. reflecting b. refracting c. deflecting d. compound e. retracting
Conservation of Momentum: A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the momentum during the collision are correct? (There could be more than one correct choice.)
A. The momentum of the truck is conserved. B. The momentum of the car is conserved. C. The car and the truck must undergo the same change in speed. D. The momentum of the car and the momentum of the truck are each conserved. E. The momentum of the car-truck system is conserved, but the momentum of each one separately is not conserved.
Saturn's bands, oval storm systems, and turbulent flow patterns are powered by
A) convective motion and rapid rotation. B) the greenhouse effect. C) a liquid metallic hydrogen interior. D) the fusion in Saturn's core. E) the tides of Titan.
Three point charges each equal to 10 microcoulombs are located at x = 1m, x = 2m, and x = 3m, respectively, on the x-axis. What is the magnitude of the electric field at the origin?
A) 2.25 × 103 N/C B) 1.22 × 105 N/C C) 1.75 × 106 N/C D) 2.70 × 104 N/C E) 1.65 × 104 N/C