In the conventional scenario, during phase of planet formation caused the jovian planets to form?
A) core-accretion
B) fragmentation
C) differentiation
D) collision
E) condensation
A
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An 1800 kg car traveling at 35.0 m/s strikes a wall. If the car comes to rest in 0.500 seconds, then the average force of the wall on the car is
A. 
B. 
C. 
D. 
E. 
Which of the following wavelength regions can be studied with telescopes on the ground?
A) radio, visible, and very limited portions of the infrared and ultraviolet regions B) all light with wavelengths longer than ultraviolet wavelengths C) all light with wavelengths shorter than infrared wavelengths D) infrared, visible, and ultraviolet light
How do we specify the location of a star on the celestial sphere?
In a chemical reaction, polyatomic ions will often
a) split up into the individual elements from which they are composed. b) remain intact during the reaction and appear the same in the products as they did in the reactants. c) change from ions into uncharged forms so that they will retain the same chemical structure but no longer react to form molecules d) react only with other polyatomic ions to make double polyatomic compounds.