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Physics 002 Midterm 1 9 October, 2001.
Time allowed: 75 minutes Total: 80 marks


Name:

Student ID:
A




Part A Multiple choice (4 marks each):

(1) At 3 am, Moon is seen at 45o above the East horizon. The phase of Moon is
A.
new


B.
crescent


C.
quarter


D.
gibbous


E.
full Answer:____




(2) Some scientists suggest that a radio telescope should be built with two receivers, one on Earth and one on Moon. Compared with Earth-bound radio telescopes, its most important advantage is that:
A.
it reduces atmospheric scattering.


B.
it increases the resolving power by reducing seeing.


C.
it increases the resolving power by increasing the light gathering power.


D.
it increases the resolving power by combining distant and interfering signals of radio waves.


E.
it increases the resolving power by reducing diffraction through the aperture formed by the Earth-Moon distance.

Answer:____



(3) At the Summer solstice, the noon Sun at a city has an angle of elevation of 80o to the South. At the Winter solstice, the angle of elevation of the noon Sun at the city becomes
A.
23.5o


B.
33 o


C.
56.5 o


D.
80 o


E.
103.5 o Answer:____




(4) If people on Earth are seeing a partial lunar eclipse, then astronauts standing on Moons surface facing Earth would see only
A.
no solar eclipse.


B.
annular solar eclipse.


C.
partial solar eclipse.


D.
total solar eclipse.


E.
partial or total solar eclipse, depending on the location on Moon.

Answer:____




(5) You are given the following data:
Planet
Mass
Radius

Venus
0.82 ME
0.95 RE

Earth
1 ME
1 RE

Mars
0.11 ME
0.53 RE



Here ME and RE are respectively the mass and radius of Earth.
Arrange the following velocities in increasing magnitude:
X is the orbital velocity around Venus at a distance of 3 RE from the center.
Y is the escape velocity from Earth at a distance of 2RE from the center.
Z is the escape velocity from the surface of Mars.
A.
X < Y < Z


B.
Z < X < Y


C.
Y < Z < X


D.
X < Z < Y


E.
Z < Y < X Answer:____




(6) When a lunar eclipse occurs, where do you have to be in order to see the eclipse?
A.
Anywhere on Earth.


B.
Anywhere where the Sun has set.


C.
Anywhere where the Moon has set.


D.
Somewhere on a specific belt called the eclipse path.


E.
Anywhere in either the Northern or Southern hemisphere, depending on the particular eclipse.

Answer:____



(7) In the figure below, when Mercury moves from P to Q,
A.
it is first seen before sunrise, and then after sunset.


B.
it is first seen after sunset, and then before sunrise.


C.
it is seen to rise from the East earlier and earlier before sunrise.


D.
it is seen to set at t