Astronomy 111 – Midterm || All Questions Answered Correctly.
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Module
Astronomy 111
Institution
Astronomy 111
Astronomy correct answers has had important practical applications including the development of Newtonian mechanics, on which much of modern technology is based
The intellectual foundation of science is correct answers observation, logic, and skepticism
The scientific method is a major force ...
Astronomy 111 – Midterm || All Questions Answered Correctly.
Astronomy correct answers has had important practical applications including the development of Newtonian mechanics, on which much of modern technology is based
The intellectual foundation of science is correct answers observation, logic, and skepticism
The scientific method is a major force in science and has been developed to ensure that correct answers theories about physical phenomena agree with what we find in experiments and observations
Forms of radiation which are not visible correct answers have allowed us to determine much of what we now know about the universe
The idea of thermonuclear fusion, the release of energy following the conservation of hydrogen nuclei into a helium nucleus, was first suggested as the source of energy in correct answers the central core of the Sun
If we could view each of the following objects from the same distance, which would be the brightest? correct answers a quasar
One arc second is equal to correct answers 1/3600*
the Moon's angular diameter in our sky is measured to be half of a degree. From this, we can find
the correct answers diameter of the Moon in kilometers if we know the Moon's distance
Astronauts on the Moon look back at Earth, whose diameter is about 12, 800 km. Since Earth-
Moon distance is about 400,000km, how much bigger will Earth appear in their sky than the Moon dies in our sky? correct answers 3.7 times
The average distance from Earth to the Sun. 149,600,000 km, can be written in shorthand notation as correct answers 1.496 x 10^8 km
The diameter of the hydrogen atom, 0.000,000,000,11 meters, can be written in shorthand notation as correct answers 1.1 x 10^-10 m
A particular molecule has a diameter of 12 billionths of a meter. This distance is equal to correct answers 12 nanometers, or 12 nm
How many powers of ten is the diameter of the Sun (1.4 × 10^5 km) greater than the length of a beetle (14 mm)? correct answers 10
One astronomical unit, or one AU is defined as the correct answers mean distance between the Sun and Earth An astronomer finds an object at a distance of 5.6 pc from Earth. Based on the distance, which of
the following is this object most likely to be? correct answers a star in our Galaxy
If a supernova was first seen in the year of Christ's birth (the Star of Bethlehem?) and its distance
from Earth is measured to be 2 kpc, approximately when did the supernova actually explode? correct answers 6520 B.C.
If the 40-kg object in the previous problem were taken to the surface of the Moon its mass would
be correct answers 4 × 10^4 grams
We know the properties of hydrogen atoms well from studying them in laboratories on Earth. A fundamental idea in astronomy is that correct answers a hydrogen atom anywhere else in the universe is the same as it is here
Heavy elements, such as those throughout Earth and within our bodies, appear to have been formed correct answers deep inside some now-vanished star
Which of the following statements best represents the overall rationale for scientific investigation? correct answers Reality is comprehensible, and a limited number of fundamental principles govern the nature and behavior of the universe.
The Ptolemaic model of the universe included each of the following features, except one. Which one is the exception? correct answers The apparent daily motion of the stars is due to the rotation
of Earth.
Greek philosophy after about 600 B.C., beginning with the Pythagoreans and others, was quite different from the philosophies (Babylonian, Egyptian, etc.) that preceded it. What was this important difference? correct answers The Greeks rejected mythological explanations for the cosmos and sought natural causes.
When observing planetary motions from Earth, the phrase "retrograde motion" refers to correct answers a slow westward motion of the planet from night to night against the background stars
From Earth, we observe occasional retrograde motion in the motion of correct answers all the planets, but not the Moon.
The greatest inaccuracy in Copernicus'ss theory of the solar system was that he correct answers placed the planets in circular orbits.
The astronomer who used parallax to show that the supernova of 1572 occurred at a large distance from Earth was correct answers Tycho Brahe
What was Tycho Brahe's conclusion regarding his parallax measurements of the stars? correct answers The parallax motion was too small for him to detect with the equipment available to him
at the time. Thus, he concluded that Earth is motionless.
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