漏一題..重貼...:P
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Story of Astronomy-Questionnaire
Fall 2002
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The purpose of this questionnaire is to understand your background
knowledge of this class. So please don't spend too much time to find
the correct answer and write down what you think directly.
(ps: the class is taught by Frank Shu in NTHU)
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1. A day represents:
a) the spin period of the Earth about its rotation axis.
b) the orbital period of the Earth around the Sun.
2. A year represents
a) the spin period of the Earth about its rotation axis.
b) the orbital period of the Earth around the Sun.
3. A year has approximately 365.24 days. This is why every fourth year
(divisible by 4) has an extra day (February 29) added to it, but the
extra day is skipped in years corresponding to centuries.
a) True
b) False
4. A month correspond, orginally, to
a) 1/12 of a year
b) the orbital period of the Moon about the Earth.
5. For x<<1 radian, the following approximation holds:
a) sin(x) = x
b) cos(x) = x
6. The derivative of sin(x) with respect to x is
a) cos(x)
b) -sin(x)
7. The integral of exp(x) over x from 0 to 1 equals
a) e+1
b) e-1
8. The surface area of a sphere of radius r is divided by its volume equals
a) 3/r
b) 3r
9. Let meter = m, kilogram = kg, second = s. Then energy divided by force has
the units of
a) kg
b) m
c) s
10. Let kilometer = km. The speed of light in a vacuum roughly equals
a) 300 km/s
b) 300,000 km/s
11. Compared to the force of gravitational attraction, the force of the
electric repulsion between two electrons at rest with respect to each
other
a) is much stronger
b) is much weaker
c) depends on the distance of their separation (Write an explanation if you
choose c.)
12. The nucleus of an ordinary helium atom contains
a) two protons and two neutrons.
b) four protrons and two electrons.
c) One protron and one neutron.
13. The shell of any electrically neutral atom of helium contains
a) two protrons
b) two electron
14. How many atoms of the hydrogen combine with one atom of carbon to form one
molecule of methane?
a) two
b) four
15. How many valence electrons is a neutral atom of oxygen getting in order to
contain a complete outer shell?
a) two
b) none
16. In a metal, all the electrons are bound tightly to the ions of the material
arranged on a crystal lattice
a) true
b) false
17. In DNA, adenine is al;ways paired with
a) guanine
b) cytosine
c) thymine
18. A protein is a polypeptide chain made of many
a) sugars
b) amino acids
19. The smallest unit of life in biology is
a) a double-stranded DNA
b) a single cell
20. The Earth is about
a) four and a half million years old
b) four and a half billion years old
21. The Earth is mostly made of
a) water
b) rock
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如果這上面的題目你有很多看不懂或沒有答案(答錯),那麼
是不是該謙虛點多多學習而不是發表謬論呢??
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