Homework set 1

1.  For the following question, use graph 1.3 from your textbook.
Which of the following countries had the highest energy use per capita (per person)?
A:  Italy
B: America (correct)
C: Poland
D: Switzerland

2. Looking at the graph 1.4, pick which of the following years marks the time when the amount
of power available per person became 1 hp.
A: 1910
B: 1890
C: 1905 (correct)
D: 1900

3. How many barrels of oil did we consume in the US in 1996?
A: 6.14 billion barrels (correct)
B: 681 billion barrels
C: 6.14 million barrels
D: none of these

4. How many tons of coal in 1996 did each person in the US use on average?
A: 82,000
B: 23.2
C: 3.8 (correct)
D: 265

5. In the scientific method, which comes first
A: analysis
B: hypothesis
C: measurement
D: observation   (Correct)

6. To measure length, which of the following units could you use?
A: centimeters
B: miles
C: kilograms
D: Both a and b (correct)
E: a, b and c

7. With a clock you measure that it takes 10 minutes to do something.  How long did it take in
seconds?
A: 60 
B: 600 (correct)
C: 6,000
D: 100

8. In a strange country, they measure distances with a unit called, "noses".  A foreigner goes there
and measures the length of her room to be 3 meters.  She is told that it really is 120 noses long. 
How many "noses" in a meter?
A: 120
B: 30
C: 40   (Correct)
D: 60


9. One galaxy has 1 x 10^8 stars. Another galaxy has 2 x 10^8 stars in it.  How many stars do
they have together?
A: 2 x 10^16
B: 200 million
C: 3 x 10^16
D: 3 x 10^8   (Correct)


10. The US consumed 21.9 x10^12 cubic feet of natural gas in 1996.  There were 2.65 x 10^8
people in the US in that year.  How many cubic feet of gas per person did we consume?
A: 8.26 x 10^4     (Correct)
B: 8.26 x 10^-4
C: 8.26 x 10^20
D: 8.26