The Earth's geological history is divided into how many eons?
A) 4
B) 1
C) 3
D) 2
A
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A 10-kg rock and a 20-kg rock are dropped at the same time and there is no air. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?
A) 4a B) 2a C) a D) a/2 E) a/4
The force due to gravity between two objects can be described using the equation Fg = G M1 M2 / d2. In this equation, what does M1 represent?
A) the mass of one of the objects B) the diameter, in meters, of one of the objects C) the distance, in meters, between the two objects
Molar Specific Heats: A rigid container is filled with 4.0 mol of air with CV = 2.5R. How much does the internal (thermal) energy of the air change if its temperature rises from 18°C to 448°C? (R = 8.31 J/mol ? K)
A. 35,800 J B. 430 J C. 3580 J D. 8940 J
What special type of information is yielded only by eclipsing binary stars?
What will be an ideal response?