The Cenozoic era consists of the Tertiary and ______________ periods
Fill in the blank(s) with correct word
Quaternary
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Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless horizontal surface. The horizontal surface has a coefficient of kinetic friction of 0.2. The vertically hanging mass is 4.00 kg and the mass on the horizontal surface is 6.00 kg. The acceleration of the 4.00 kg mass is
A. 1.98 
B. 2.74
C. 4.88
D. 6.73
E. 7.84
What are the three possible outcomes of stellar evolution? Describe each possibility, differentiating their means of formation and their subsequent properties. Which stars on the Main Sequence are thought to end up in each of these forms?
What will be an ideal response?
The units of work are the same as those of ______________
Fill in the blank(s) with correct word
Summarize the links in the distance chain that allow us to estimate distances to the farthest reaches of the universe
What will be an ideal response?