From Wikiversity
Jump to navigation Jump to search
This plate from Sidney Hall - Urania's Mirror has directions indicated on the upper left side. Credit: Sidney Hall and Adam Cuerden.

Distances/Vectors is a lecture about the application of laboratory physics to astronomical distances. It is a joint offering from the radiation astronomy department and the physics department of the school of physics and astronomy. On the plate from Sidney Hall on Urania's Mirror, directions of North, East, West, and South are indicated.

You are free to take this quiz based on Distances/Vectors at any time.

To improve your score, read and study the lecture, the links contained within, listed under See also, External links, and in the {{radiation astronomy resources}} and {{physics resources}} templates. This should give you adequate background to get 100 %.

As a "learning by doing" resource, this quiz helps you to assess your knowledge and understanding of the information, and it is a quiz you may take over and over as a learning resource to improve your knowledge, understanding, test-taking skills, and your score.

Suggestion: Have the lecture available in a separate window.

To master the information and use only your memory while taking the quiz, try rewriting the information from more familiar points of view, or be creative with association.

Enjoy learning by doing!


1 True or False, A calculation of energy is not possible unless a distance is involved.


2 Which of the following is not an electron volt?

the angular momentum of the planet Mercury around the Sun
a unit of energy
a quantity that denotes the ability to do work
1.2 PeV
a unit dimensioned in mass, distance, and time
a unit not based on the Coulomb

3 True or False, The force of gravity is a major portion of the strong nuclear force.


4 Complete the text:


tracks in emulsion chambers have been used for

measurements of

nuclei above

in a series of balloon-borne experiments.

5 True or False, The average value of the radius of the Earth's orbit around the Sun is a displacement.


6 The science of physical and logical laws is called

7 True or False, The temperature of the cores of stars may be determined by the balance between the gravitational attraction and the gas pressure.


8 The use of the principle of line of sight allows what phenomenon to be determined?

the Moon is closer to the Earth than the Sun
the planet Mercury is nearer to the Earth than Venus
any cumulus cloud overhead follows the Sun across the sky
the plane of the Earth's orbit around the Sun is in the plane of the galaxy
the surface of the photosphere of the Sun is hotter than the surface of Mars
lightning always precedes rain

9 True or False, A unit vector is a direction with a magnitude of one.


10 Which of the following are involved in the weak force?

a core which emits neutrinos
Fermi's β-decay theory
undetectable with balloon-borne detectors
Gamow-Teller interactions
steady enough emission to be used as a standard for X-ray emission
observed with delta-rays in 1731
M. Fierz

11 True or False, Any space in the real universe is completely empty of microwaves.


12 The strong force is involved in which of the following phenomena?

the sum of the spins
Pauli's exclusion principle
radio waves

13 True or False, When the magnetic poles of the Sun reverse during the solar cycle, there is a short time in which the polar diameter is greater than the equatorial diameter.


14 Which of the following are associated with electromagnetics?

angular momentum transfer
solar wind
the baryon neutrino
charge neutralization

15 True or False, The generalized weak force theory combines the Fermi and Gamow-Teller conditions into a unified theory.


16 Which of the following are associated with the big bang neutrinos?

a launch location
relic neutrinos
of order of the photon density
the thermal energy at which neutrinos decouple
neutrinos dynamically dominate baryons
a contracting universe

17 True or False, The force of gravity is the first astronomical source of the strong nuclear force.


18 The generalization to self-gravitating continua is outlined focused on the classification problem of singularities and metamorphoses arising in the


19 If energy is the impetus behind all motion and activity, which of the following are associated with power?

a launch location
a rate of change of the impetus with time
photon density
an acceleration of the impetus
neutrinos dynamically dominating baryons
a rate of change of mass

20 Yes or No, North is generally regarded as an upward direction.


21 A first astronomical source has?

a temporal distribution with at least one datum
a spectral distribution
a spatial distribution
a position or location
a geognosy
scientific or observational investigations


For standard basis, or unit, vectors (i, j, k) and vector components of a (ax, ay, az), what are the right ascension, declination, and value of a?

if the x-axis is the longitude of the Greenwich meridian, and ax equals ay, then RA equals 6h
if the x-axis is the longitude of the Greenwich meridian, and ax equals ay, then RA equals 3h
the value of a is given by
if ax equals ay equals az, then the declination is -45°
if ax equals ay equals az, then the declination is +45°

23 Which of the following are characteristic of the first true astrophysical gamma-ray source?

a strong 2.223 MeV emission line
a solar flare
the formation of deuterium
the electron neutrino


[edit | edit source]
  1. More questions aimed at distances and vectors may be better.

See also

[edit | edit source]
[edit | edit source]

{{Radiation astronomy resources}}