A student spends 2 hours one night recording the movement of the Big Dipper constellation compared to a tree on the north side of the yard.
During that time, the Big Dipper appears to move higher above the tree.
How should the student explain the movement of the Big Dipper constellation?

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?