Download PHYS103 Hour Exam No. 2 Page: 1 1 The time it takes for Jupiter to

PHYS103
Hour Exam No. 2
Page: 1
1 The time it takes for Jupiter to travel once around the Sun is closest to
a. one Earth Year.
b. 88 Earth days.
c. 30 Earth years.
d. 84 Earth years.
e. 12 Earth years.
2 A comet that is passing close to the Sun will have a tail that is most likely
a. very long because sunlight is pushing on it.
b. spherical in shape because the comet is being heated by the Sun.
c. very short because there is no room for a long tail near the Sun.
d. not yet formed because the sunlight suppresses it.
3 The number of moons of Venus is
a. at least 62.
b. 4.
c. 1.
d. 0.
e. 2.
4 Newton’s Universal Law of Gravity explains all but one of the following things:
a. how objects fall on Earth.
b. how lightning works.
c. planetary motion.
d. the motion of the Moon around the Earth.
e. ocean tides.
5 Jupiter has the most mass of any planet in our Solar System and is also the largest planet. Objects that have
still more mass than Jupiter and are not stars are usually
a. smaller than Jupiter.
b. about the same size as Jupiter.
c. larger than Jupiter.
6 In the ancient Greek theory of gravity, everything was attracted to the center of the universe. In Newton’s
theory of gravity, everything was attracted
a. only to the center of the Earth.
b. only to the Sun.
c. to every other object in the universe.
d. only to massive heavenly objects such as the Sun, Moon, planets, and the Earth.
7 The current model for the way that planets acquire magnetic …elds suggests that a rapidly rotating planet will
a. have a magnetic …eld if it has a large enough liquid core.
b. always have a magnetic …eld.
c. have a magnetic …eld if its core contains enough liquid electrical conductor.
d. have a magnetic …eld if it has a large enough iron core.
e. never have a magnetic …eld.
PHYS103
Hour Exam No. 2
8 The magnetic …eld of Jupiter is
a. about 1% of the Earth’s magnetic …eld.
b. about 100 times the intensity of the Earth;s magnetic …eld.
c. essentially zero.
d. Similar in intensity to the Earth’s magnetic …eld.
e. about 10 times the intensity of the Earth’s magnetic …eld.
9 The …rst space probe to reach the planet Mercury was
a. Mariner 9.
b. MESSENGER.
c. Mariner 10.
d. Pioneer 10.
e. Pioneer 11.
10 Ancient lava ‡ows on the Moon are called Lunar
a. terrae.
b. craters.
c. maria.
d. planitia.
e. valleys.
11 When Galileo dropped a wooden ball and a heavier iron ball at the same time, he found that
a. sometimes the wooden ball hit …rst, sometimes the iron one hit …rst.
b. the wooden ball always hit long before the iron one.
c. the iron ball always hit long before the wooden one.
d. both balls always hit at exactly the same time.
12 Which of the following three systems is regarded as the most normal for a terrestrial planet?
a. Mars, with two moons each the size of an asteroid.
b. Venus, with no moons at all.
c. Earth, with a moon larger than the dwarf planet Pluto.
13 In the surface environment of Mars, water exists
a. Mostly as ice and water vapor.
b. in all three forms, solid, liquid, and gas.
c. Only as ice.
d. Only as water vapor.
14 What total force will cause an object with a mass of 2kg to gain 5 meters per second every second?
a. 9.8 Newtons.
b. 10 Newtons.
c. 490 Newtons.
d. 2 Newtons.
e. 5 Newtons.
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15 Uranus’s magnetic North and South poles are
a. displaced from its rotation axis poles and also from the center of the planet.
b. displaced from its rotation axis poles, but still symmetrical about its center, much like Earth’s.
c. almost exactly aligned with its rotation axis.
d. near the equator of the planet.
16 You are standing in an elevator that is accelerating upward at 1m/s2 . Which of the following pairs of forces is
an action-reaction pair that has to be exactly equal and opposite to each other?
a. The force that the ‡oor of the elevator exerts on you and the force that you exert on the ‡oor of the
elevator.
b. None of these pairs because acceleration requires an unbalanced force.
c. The force of gravity on you and the force that the ‡oor of the elevator exerts on you.
d. The force of gravity on you and the force that you exert on the ‡oor of the elevator.
17 The Mars Global Surveyor
a. was the …rst Mars orbiter.
b. operated in Mars orbit for nine years until 2006.
c. tested the use of ion drive rockets for planetary exploration.
d. looked for landing sites for Viking 1 and 2.
18 If an object is moving at constant speed in a straight line, its acceleration is
a. changing.
b. zero.
c. negative in its direction of motion.
d. positive in its direction of motion.
19 Which of the following was the spacecraft that operated in Mars orbit for nine years, …nding traces of water and
an early magnetic …eld?
a. Mariner 9
b. Mars Global Surveyor
c. Viking orbiter 2
d. Viking orbiter 1
e. Surveyor 1
20 Which of the following planets does the moon Callisto orbit?
a. Saturn
b. Jupiter
c. Mars
d. Neptune
e. Uranus
21 Saturn is about
a. the same distance from the Sun as Jupiter
b. twice as far from the Sun as Jupiter
c. …ve times as far from the Sun as Jupiter.
d. 50% farther from the Sun than Jupiter.
e. half as far from the Sun as Jupiter.
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22 The blue color of the planet Uranus is caused by the presence in its atmosphere of
a. cyanide.
b. hydrogen and helium.
c. carbon dioxide.
d. oxygen.
e. methane.
23 A model in which the Moon forms by breaking away from the Earth would predict that the Moon’s orbit should
be
a. in the plane of the Earth’s equator.
b. somewhat tilted relative to the plane of the Earth’s equator.
c. perpendicular to the plane of the Earth’s equator.
d. in the plane of the ecliptic.
24 According to Aristotle, a thrown spear keeps moving after it has left the spear thrower’s hand because
a. the force of the air disturbed by the spear keeps it in motion.
b. the force of friction with the air is not enough to stop the spear.
c. the force of the hand keeps acting on the spear.
d. the force of inertia keeps the spear going.
25 The Moon rotates on its axis so that it always keeps
a. the same side toward a particular distant star.
b. the same side (its dark side) pointed away from the Sun.
c. the same side (its far side) pointed away from the Earth.
26 The magnetic …eld of Venus is
a. about 1% of the Earth’s magnetic …eld.
b. about 10 times the intensity of the Earth’s magnetic …eld.
c. about 100 times the intensity of the Earth;s magnetic …eld.
d. essentially zero.
e. Similar in intensity to the Earth’s magnetic …eld.
27 When Newton calculated the magnitude and direction of the acceleration for a planet that was following Kepler’s
Laws, he found that the magnitude of the planet’s acceleration was
a. inversely proportional to the square of the planet’s distance from the Sun.
b. proportional to the planet’s distance from the Sun.
c. inversely proportional to the planet’s distance from the Sun.
d. a constant.
e. proportional to the square of the planet’s distance from the Sun.
28 At present (within the last few hundred years) the orbit of Mars around the Sun is
a. slightly elliptical so that.the intensity of sunlight varies by 6 percent.
b. slightly elliptical but not enough to change the intensity of sunlight by even 1 percent.
c. hyperbolic so that Earth will leave the Solar System and never return.
d. exactly circular so that the intensity of sunlight never changes.
e. very elliptical so that.the intensity of sunlight varies by 40 percent.
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29 The angle between the rotation axis of a planet and the perpendicular to the plane of its orbit is called its “axial
tilt.” Which of these planets has an axial tilt that is less than one degree?
a. Mercury.
b. Earth.
c. Uranus.
d. Mars.
e. Saturn.
30 Space probes often use gravitational slingshot maneuvers. The main purpose of these maneuvers is to
a. launch probes from Earth orbit without using rockets.
b. change the direction and speed of the probe without using rockets.
c. arrive at the destination at the right time.
d. see more planets in a single trip.
31 Hydrated minerals on the Moon
a. are almost completely absent.
b. are present in the same proportions as on Earth.
c. are more abundant than on Earth.
32 The Van Allen Belts are
a. where Earth’s magnetic …eld traps charged particles from the Sun.
b. ionosphere currents that help sustain the Earth’s magnetic …eld.
c. where the Earth’s magnetic …eld exactly balances its gravitational …eld.
d. regions where large numbers of asteroids orbit the Earth.
33 Saturn’s magnetic North and South poles are
a. displaced from its rotation axis poles, but still symmetrical about its center, much like Earth’s.
b. almost exactly aligned with its rotation axis.
c. near the equator of the planet.
d. displaced from its rotation axis poles and also from the center of the planet.
34 Mars
a. has a solar day that is very close to an Earth day in length.
b. always keeps the same side toward the Sun so that solar time never changes.
c. has a solar day that last for two complete orbits around the Sun.
d. has a solar day that last for three complete orbits around the Sun.
e. rotates backwards so that the Sun rises in the West.
35 Uranus rotates on its axis once in about
a. 10 hours.
b. 10 Earth days.
c. 88 Earth days.
d. 17 hours.
e. 24 hours.
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36 The fact that the International Space Station is above most of the Earth’s atmosphere is important because it
means that
a. the space station can skim along the top of the atmosphere.
b. there is no gravity to pull the space station down.
c. there is no air friction to slow the space station down.
37 Apollo 11 made the …rst
a. test of docking procedures in lunar orbit.
b. landing on the Moon by a spacecraft.
c. manned orbit of the Moon.
d. manned landing on the Moon.
38 Once its rockets have ceased …ring, an Intercontinental Ballistic Missile will follow a path that is best described
as
a. a circle around the center of the Earth.
b. a parabola.
c. an ellipse with the center of the Earth at one focus.
d. a circle around a point just below the surface of the Earth.
e. a straight line.
39 An astronomical unit is de…ned to be
a. the average distance from our Sun to the nearest star.
b. the average distance from our Sun to the closest planet, Mercury.
c. the average distance from the Earth to the Sun.
d. the average distance from the Earth to the Moon.
40 Which of the following objects is the largest moon of Neptune?
a. Ganymede
b. Triton
c. Titan
d. Titania
e. Callisto
41 Which of these sequences places the outer planets in the correct order from the Sun, from the closest to the
farthest.
a. Jupiter, Saturn, Uranus, Neptune (farthest)
b. Jupiter, Saturn, Neptune, Uranus (farthest)
c. Saturn, Jupiter, Neptune, Uranus (farthest)
d. Saturn, Jupiter, Uranus, Neptune (farthest)
42 Relative to the distant stars, Mercury
a. does not rotate at all.
b. completes just one full rotation each time it orbits the Sun.
c. completes 2 rotations each time it orbits the Sun.
d. completes 1.5 rotations each time it orbits the Sun.
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43 Which of the following spacecraft is the only one to have ‡own past Neptune?
a. Pioneer 11
b. Cassini-Huygens
c. Voyager 2
d. Voyager 1
e. Galileo
44 Which of the following spacecraft were the …rst to ‡y past Jupiter?
a. Voyager 1 and Voyager 2
b. Viking 1 and Viking 2
c. Pioneer 10 and Pioneer 11
d. Mariner 9 and Mariner 10
45 Which of the following types of object could reasonably be described as “dirty snowballs”or, for the larger ones,
“‡ying icebergs?”
a. Asteroids.
b. Kuiper Belt Objects.
c. Terrestrial Planets.
d. Stars.
e. Meteors.
46 The density of rock is about 3000kg/m3 . The density of the Earth is
a. close to 3000kg/m3 because most of the Earth is rock.
b. greater than 3000kg/m3 because the Earth has an iron core.
c. less than 3000kg/m3 because so much of the Earth is water.
47 The range of temperatures on Mars is
a. much hotter than anywhere on Earth.
b. Similar to those in Antarctica.
c. Similar to those in Rochester New York.
d. Much colder than anywhere on Earth.
48 Jupiter has
a. an atmosphere of carbon dioxide with about 90 times the surface pressure of Earth’s.
b. an atmosphere of carbon dioxide with about 1% the surface pressure of Earth’s.
c. an atmosphere of Hydrogen and Helium with no real surface.
d. an atmosphere of Hydrogen and Helium with some methane.
e. almost no atmosphere.
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49 Who discovered Newton’s First Law of Motion?
a. Galileo.
b. Aristotle.
c. Tycho Brahe.
d. Kepler.
e. Newton.
50 In comparison to Kepler’s Laws of Planetary Motion, Newton’s theory of Universal Gravitation predicted almost
the same motions, but with small corrections due to
a. the elliptical orbits of the planets.
b. the gravitational attraction between each planet and the Sun.
c. velocity-dependent forces that act more strongly on the faster inner planets.
d. small time lags caused by the propagation of gravity to each planet.
e. the gravitational attractions between di¤erent planets.
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Hour Exam No. 2
Answer Key:
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Spring 2017 HX2C
1 Choice e.
(12 Earth years.)
2 Choice a.
(very long because sunlight is pushing on it.)
3 Choice d.
(0.)
4 Choice b.
(how lightning works.)
5 Choice a.
(smaller than Jupiter.)
6 Choice c.
(to every other object in the universe.)
7 Choice c.
(have a magnetic …eld if its core contains enough liquid electrical conductor.)
8 Choice e.
(about 10 times the intensity of the Earth’s magnetic …eld.)
9 Choice c.
(Mariner 10.)
10 Choice c.
(maria.)
11 Choice a.
(sometimes the wooden ball hit …rst, sometimes the iron one hit …rst.)
12 Choice b.
(Venus, with no moons at all.)
13 Choice a.
(Mostly as ice and water vapor.)
14 Choice b.
(10 Newtons.)
15 Choice a.
(displaced from its rotation axis poles and also from the center of the planet.)
16 Choice a.
(The force that the ‡oor of the elevator exerts on you and the force that you exert on the ‡oor of
the elevator.)
17 Choice b.
(operated in Mars orbit for nine years until 2006.)
18 Choice b.
(zero.)
19 Choice b.
(Mars Global Surveyor)
20 Choice b.
(Jupiter)
21 Choice b.
(twice as far from the Sun as Jupiter)
22 Choice e.
(methane.)
23 Choice a.
(in the plane of the Earth’s equator.)
24 Choice a.
(the force of the air disturbed by the spear keeps it in motion.)
25 Choice c.
(the same side (its far side) pointed away from the Earth.)
26 Choice d.
(essentially zero.)
27 Choice a.
(inversely proportional to the square of the planet’s distance from the Sun.)
28 Choice e.
(very elliptical so that.the intensity of sunlight varies by 40 percent.)
29 Choice a.
(Mercury.)
30 Choice b.
(change the direction and speed of the probe without using rockets.)
31 Choice a.
(are almost completely absent.)
32 Choice a.
(where Earth’s magnetic …eld traps charged particles from the Sun.)
33 Choice b.
(almost exactly aligned with its rotation axis.)
34 Choice a.
(has a solar day that is very close to an Earth day in length.)
35 Choice d.
(17 hours.)
PHYS103
Hour Exam No. 2
36 Choice c.
(there is no air friction to slow the space station down.)
37 Choice d.
(manned landing on the Moon.)
38 Choice c.
(an ellipse with the center of the Earth at one focus.)
39 Choice c.
(the average distance from the Earth to the Sun.)
40 Choice b.
(Triton)
41 Choice a.
(Jupiter, Saturn, Uranus, Neptune (farthest))
42 Choice d.
(completes 1.5 rotations each time it orbits the Sun.)
43 Choice c.
(Voyager 2)
44 Choice c.
(Pioneer 10 and Pioneer 11)
45 Choice b.
(Kuiper Belt Objects.)
46 Choice b.
(greater than 3000kg/m3 because the Earth has an iron core.)
47 Choice b.
(Similar to those in Antarctica.)
48 Choice c.
(an atmosphere of Hydrogen and Helium with no real surface.)
49 Choice a.
(Galileo.)
50 Choice e.
(the gravitational attractions between di¤erent planets.)
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Hour Exam No. 2
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Where to find these questions in the notes
1 Module 012.110-g01 The Jovian Planets Jupiter Orbit and Rotation
2 Module 010.504-g01 Solar System Overview Comets
3 Module 011.209 The Terrestrial Planets Venus Moons
4 Module 009.404-g01 Science Models of Gravity Unifying Physical Law
5 Module 012.107-g01 The Jovian Planets Jupiter Surface
6 Module 009.301 Science Models of Gravity Universal Gravitation
7 Module 011.109-g01 The Terrestrial Planets Mercury Magnetic Field
8 Module 012.111 The Jovian Planets Jupiter Magnetic Field (44%)
9 **Module 011.115 The Terrestrial Planets Mercury Space Probes (31%)
10 Module 011.402 The Terrestrial Planets Moon Surface Features
11 Module 008.403 Science Models of Motion The Universality of Free Fall
12 Module 010.204 Solar System Overview The Terrestrial Planets (42%)
13 Module 011.505 The Terrestrial Planets Mars Surface
14 Module 008.508 Science Models of Motion Force and Mass F=ma
15 Module 012.311 The Jovian Planets Uranus Magnetic Field
16 Module 008.601-g01 Science Models of Motion Action and Reaction
17 Module 011.522 The Terrestrial Planets Mars Space Probes
18 Module 008.302 Science Models of Motion Acceleration
19 *Module 011.521 The Terrestrial Planets Mars Space Probes (35%)
20 Module 012.120 The Jovian Planets Jupiter Moons (47%)
21 Module 012.203-g01 The Jovian Planets Saturn Surface
22 Module 012.301-g01 The Jovian Planets Uranus Surface
23 ***Module 011.414-g01 The Terrestrial Planets Moon Oddities of the Moon Formation of the Moon (27%)
24 Module 008.103 Science Models of Motion Aristotle (44%)
25 Module 011.409-g01 The Terrestrial Planets Moon Orbit and Rotation
26 **Module 011.207 The Terrestrial Planets Venus Magnetic Field (33%)
27 **Module 009.102 Science Models of Gravity Explaining Kepler’s Laws (30%)
28 Module 011.509-g01 The Terrestrial Planets Earth Orbit and Rotation
29 *Module 011.104-g01 The Terrestrial Planets Mercury Surface (38%)
30 Module 011.114 The Terrestrial Planets Mercury Space Probes
31 Module 011.417 The Terrestrial Planets Moon Oddities of the Moon Formation of the Moon
32 Module 011.307-g01 The Terrestrial Planets Earth Magnetic Field
33 ***Module 012.213 The Jovian Planets Saturn Magnetic Field (25%)
34 Module 011.507 The Terrestrial Planets Mars Orbit and Rotation
35 Module 012.307 The Jovian Planets Uranus Orbit and Rotation
36 Module 009.606 Science Models of Gravity Arti…cial Satellites
PHYS103
Hour Exam No. 2
37 Module 011.422-g01 The Terrestrial Planets Moon Space Probes
38 Module 009.603 Science Models of Gravity Arti…cial Satellites
39 Module 010.102 Solar System Overview The Big Picture
40 Module 012.409 The Jovian Planets Neptune Moons
41 Module 010.104 Solar System Overview The Big Picture
42 Module 011.106 The Terrestrial Planets Mercury Orbit and Rotation (47%)
43 Module 012.411 The Jovian Planets Neptune Space Probes
44 Module 012.123 The Jovian Planets Jupiter Space Probes (45%)
45 Module 010.602-g01 Solar System Overview Comets
46 Module 010.202 Solar System Overview The Terrestrial Planets
47 Module 011.503 The Terrestrial Planets Mars Surface
48 Module 012.101 The Jovian Planets Jupiter Surface
49 Module 008.501 Science Models of Motion Force and Mass
50 Module 009.503-g01 Science Models of Gravity Making New Predictions
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