A 5000-kg freight car runs into a 10,000-kg freight car at rest. They couple upon collision and move with a speed of 2 m/s. What was the initial speed of the 5000-kg car?
A) 4 m/s
B) 5 m/s
C) 6 m/s
D) 8 m/s
E) none of the above
C
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What are the likely sources of this sediment?
The question is based on Map T-16, the “Corpus Christi, Texas” topographic map (scale 1:250,000; contour interval 10 meters) and Figure 49-9, a satellite image you can view by going to the Lab Manual website or by scanning the QR code for this exercise. Padre Island is a prominent barrier island south of Corpus Christi, Texas 127°17'22"N, 97°24'21"W). What will be an ideal response?
Which of the following is NOT a way earth science informs us about Earth's past?
A. how life in the past was different than today B. how past global climate was different than today C. how the first second of the universe differed from a second today D. why a landscape looks the way it does today E. why continents and oceans are different
In which of the following region would you expect to have the highest levels of seawater sality?
A) equatorial oceans B) subtropical oceans C) polar oceans. D) midlatitude oceans.
The influenza pandemic of 1918-1919 killed more people than World War I.
Answer the following statement true (T) or false (F)