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(PHYS002)mid1a_s02.pdf
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Physics 002 Midterm 1 12 March, 2002.
Time allowed: 70 minutes Total: 70 marks

Name:

Student ID:
A




Part A: True or false questions (16 marks, 2 marks each)

If you live on Mars,


True
False

1
Earth is never seen in the sky at midnight.



2
Jupiter can go through a full set of phases.



3
Venus appears to be largest at the full phase.








True
False

4
During a solar eclipse, the Moon must be full.



5
During a lunar eclipse, the observer must be in the path of totality.



6
During a solar eclipse, the diamond ring effect appears twice.



7
X-rays easily penetrate Earths atmosphere and reach the ground from space.



8
It is possible to increase the resolving power of telescopes by widening the aperture and positioning on the mountain top.






Part B Short questions (18 marks, 2 marks each)


Phase of the Moon
Position of the Moon
Time of the day

1
First quarter
East horizon


2
Third quarter

Sunrise

3

45o above West horizon
3 am




An observer lives at a latitude 30o North.


Answer

4
What is the angle of the Polaris above the Northern horizon?


5
What is the angle of elevation of the Sun at the Winter Solstice? (The angle of elevation of an object is the angle its direction makes with the horizon.)


6
What is the highest angle of elevation of Cassiopeia, which has an angular separation of 26o with the Polaris?





What are the temperatures of the following stars? Give your answer to the nearest thousand degrees Kelvin. (Surface temperature of the Sun = 6,000 K)


Answer

7
A star with a maximum intensity at a wavelength of 900 nm.


8
A star with strong lines of neutral helium.


9
A star with 2 solar radius and 1400 solar luminosity.




Part C Problems

Problem 1 (20 marks)

You are staying on Earth and observing Jupiter. The orbits of both Earth and Jupiter are essentially circular and anticlockwise as seen from the North. The synodic period of Jupiter as seen from Earth is 399 days. Suppose that the phase of Jupiter you observe now is full.
(a)
Locate, with letter P in the following figure, the present position of Jupiter. [2] th letter P in the following figure, the present position of Jupiter. [2]


(b)
Locate, with letter B in the following figure, the position of Earth after one synodic period. [2] (b) Locate, with letter B in the following figure, the position of Earth after one synodic period. [2]






















(c)
What is the angle in the figure above? Give your answer in degrees to 1 decimal place. [4] (c) What is the angle in the figure above? Give your answer in degrees to 1 decimal place