The occasional backward motion of the planets against the background of fixed stars is called _____
A) anterograde motion
B) rotation
C) oscillation
D) retrograde motion
D
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Where would a brown dwarf be located on an H-R diagram?
A) below and to the right of the lowest part of the main sequence B) above and to the left of the highest part of the main sequence C) in the upper right corner of the H-R diagram D) in the lower left corner of the H-R diagram
A 0.50-kg box is attached to an ideal spring of spring constant 20 N/m on a horizontal, frictionless floor
The box oscillates in simple harmonic motion and has a speed of 1.5 m/s at the equilibrium position. (a) What is the amplitude of vibration? (b) At what distance from the equilibrium position are the kinetic energy and the potential energy the same?
There are many no-cost measures that can be adopted that would reduce warming
What will be an ideal response?
Rank the following compounds by solubility in water, from most soluble to least
1) CH3CH2OH 2) CH3OCH3 3) CH3CH2NH2 A) 1, 3, 2 B) 1, 2, 3 C) 3, 2, 1 D) 3, 1, 2 E) 2, 1, 3