| Chap 3 | Chap 6 | ||
| Chap 7 | Chap 8 and 9 | Chap 10 | |
| final review |
| Chap 4 |
Chap 5 |
test1 review |
sample test1 test1 (2002) test1 answers(2002) |
| Chap 7 |
test 2 review |
chap 23 |
|
| Homework Set |
Due Date |
Projects | Exercises | Problems | Other (Extra Credit) |
Solutions |
| 1 | Sept 5 | Chap 2: 8, 14, 16, 18, 23, 24, 30, 38 | See Chapter 1 Problems |
Estimation 1 See below. |
here | |
| 2 | Sept 12 | Chap 3: 4, 6, 14, 26 Chap 4: 6, 12, 24, 26 |
Chap 3: 4, 6, 9 |
Estimation 2 see below |
here |
|
| 3 | Sept 25 | Chap 4: 28, 30, 36 Chap 5: 2, 8, 10, 24, 32 |
Chap 4: 6, 8 Chap 5: 2 |
Estimation
3 see below |
here | |
| 4 | Sept 29 | Chap 6: 2, 8, 12,
20, 24, 38, 40, 42 |
Chap 6: 2, 4, 8 |
Estimation 4 see below |
here | |
| none | Oct 3 | |||||
| 5 | Oct 15 | Chap 7: 2, 4, 8, 10, 16,
18, 20, 34, 36 |
Chap 7: 2, 6 |
Estimation 5 see below |
here | |
| 6 | Oct 20 | Chap 8:3, 4 |
Chap 7: 40, 44, 48 Chap 8: 2, 4, 6, 10 |
Chap 8: 2 |
Estimation 6 see below |
here |
| 7 | Oct 24 | Chap 8: 18, 22, 34, 36, 46, 48 (see hint below),
49 (and two more below) |
Chap 8: 6 (and two more below) |
Estimation 7 see below |
Here | |
| 8 | Oct 31 |
Chap 9: 2, 10, 11, 14, 26
Chap 10: 12, 18, 38 (and one more below) |
Chap 9: 2, 6 Chap 10: 6 |
Chap 9: Prob 10 |
Here | |
| none | Not Due | sample test 2 |
here |
|||
| 9 | Nov 14 | Chap 22: 2 |
Chap 22: 4, 6, 8, 10, 18,
20, 24, 32, 38 |
Chap 22: 2 |
Estimation 9 see below |
Here |
| 10 | Nov 21 | Chap 23: 4, 16, 18, 20,
22, 26, 28, 38, 46, 50 |
Chap 23: 6 |
Estimation 10 see below |
Here | |
| 11 | Dec 5 | Chap 24: 2, 8, 18, 20, 22,
28, 30, 34 Chap 25: 2, 4, 10, 18, 26, 27, 34 |
Chap 25: 2 |
Estimation 11 See below |
Here |
Extra 1: An astronaut with a mass of 70 kg is in a space station rotating to give him the same weight as on Earth. What is the weight of the astronaut (in pounds) on the Earth? Something goes wrong and the rotational velocity of the space station doubles. What is the apparent weight of the astronaut now (in pounds)?
Extra 2: Neglect the weight of a meter stick and consider only the two weights hanging from its ends. A 2 kg weight hangs from one end and a 4 kg weight hangs from the other. Where is the center of mass of this system (the point of balance)? How does your answer relate to torque? (Hint: This is the same as Problem 3, but with the numbers changed.)
Hint for Chapter 8, exercise 48: The phrase 'How does the wheel respond' means 'Does the wheel rotate? If so, in which direction does it rotate?'
Chapter 10 extra exercise: Estimation problems are designed to help you understand the
difference between and a million and a billion and to
help you get comfortable with large numbers (ie: exponents).
These are questions where you need to supply some of the
information (ie: estimate). For example, in the first question,
you need to estimate the thickness of a card. Your answer
should almost never have more that one significant figure (that's
the number before the 10^x) because your estimate will never be
that accurate.
Sample question: How far could you walk in a year?
Sample answer: I walk about 3
miles per hour. If I walk 12 hours per day and
365 days per year then I can walk
3 mi/h * 12
h/day * 365 day/yr = 13140 mi/yr = 1 * 10^4 mi in one
year
Note that 13140 mi is wrong because
it implies that you know the answer much better than you
actually do. The 3 mph might be 2.5 or 4. The 12
hours/day might be 8 or 14. You might have to take some days
off. 1*10^4 implies that the answer is not very precise.
Chapter 1 Estimation: Your chance of winning MegaMillions is about 1 in 10^8 (ie: one in one hundred million). This is the same probability as drawing the only correct card from a deck with 10^8 cards. If you stacked 10^8 cards in a single pile, how tall would that pile be (in meters)? Which distance is this closest to: a) a tall building (100 m), b) a small mountain (1000 m), c) Mt Everest (10,000 m), d) the height of the atmosphere (10^5 m), e) the distance from here to Chicago (10^6 m), f) the diameter of the Earth (10^7 m), g) the distance to the moon (4x10^8 m)?
Estimation 2: The average American drives 12,000 miles per year. How many hours does one average American spend in her car each year? How many total hours do ALL Americans spend in their cars each year? How much is this in years? In lifetimes?
Estimation 3: How fast does your hair
grow? Express your answer in a) inches per year, b)
m/s, and c) miles per hour.
Estimation 4: Can you run fast
enough to have the same momentum as an automobile rolling at
1 mi/hr? Make up reasonable figures to justify your answer.
(Obviously your answers will differ for a Mini or for a huge SUV.)
Estimation 5: How many dump
truck loads of yard debris (trees, branches, etc) needed to be removed
from Norfolk and Virginia Beach after Hurricane Isabel?
Estimation 6: How much potential energy
do you gain (in Joules) when you climb the highest mountain in Virginia
Beach (Mt. Trashmore)? When you climb a real mountain?
How much is this in food calories (1 food calorie = 4000 J)?
Estimation 7: What is the rotational inertia of the Earth as it spins on its axis? What is the rotational inertia about the axis of the Earth of the entire human population if we were all standing at the equator? If we all moved from the equator to the North Pole, by what fraction (eg: 10^(-1), 10^(-2), ...) would the total rotational inertia of the Earth change?
Estimation 9: A penny contains about 10^25
protons and 10^25 electrons. If all the protons in a penny were
placed at the North Pole and all the electrons were placed at the South
Pole, what would be the electrical force between the protons and the electrons?
Give your answer in Newtons and in pounds. How does this force
compare to the weight of a person (100 lbs), a small car
(1000 lbs), a small truck (10^4 lbs), a loaded semi trailer (10^5
lbs), a small cargo ship (10^6 lbs), the USS Wisconsin (10^8 lbs), a
super tanker (10^9 lbs), a large hill (10^15 tons), a Virginia
mountain (10^20 tons), Mt Everest (10^23 tons), ...
Estimation 10: On average, how much
total power do Norfolk, Virginia Beach, Portsmouth and Chesapeake use?
Hint: consider how much power one household uses and multiply by the number
of households in the region. Give your answer in Watts. One significant
figure is sufficient since only the exponent (the power of ten) really
matters.
Estimation 11: Your computer's disk drive holds 100 GigaBytes of data (that's 10^11 Bytes = 8*10^11 bits). The bits are encoded on the disk drive by small regions that are magnetized in one direction or another (eg: either up or down). How large a region does it take to encode one bit of data? Express your answer in square meters (m^2). If each region is a square, how long is the side of the square? (If the square is 9 m^2 then the side of the square is 3 m. If the square is 0.01 m^2 then the side of the square is 0.1 m.)