Charges/Interactions/Weak/Quiz

The ALMA correlator is one of the most powerful supercomputers in the world. Credit: ALMA (ESO/NAOJ/NRAO), S. Argandoña.

Weak interaction is a lecture and an article about the application of laboratory and theoretical physics to astronomical phenomena.

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Quiz

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1 Which of the following are characteristic of a β⁺ decay?

	a positron emission
	a decay product of a neutron
	weak interaction
	an electron neutrino
	comes in mutable varieties
	a mu neutrino

2 True or False, A calculation of energy is not possible unless a mass is involved.

	TRUE
	FALSE

3 Which of the following is not an electron volt?

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

4 Complete the text:

Match up the item letter with each of the first astronomical source possibilities below:

Meteors - A

Cosmic rays - B

Neutrons - C

Protons - D

Electrons - E

Positrons - F

Gamma rays - G

Superluminals - H

cosmic rays

galactic nuclei .

electron-positron annihilation .

weak force nuclear decay .

AGNs .

511 keV photon pair production .

solar wind .

comets .

5 Complete the text:

The tracks in emulsion chambers have been used for measurements of nuclei above in a series of balloon-borne experiments.

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

	TRUE
	FALSE

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

	a core which emits neutrinos
	Fermi's β-decay theory
	26Al
	undetectable with balloon-borne detectors
	steady enough emission to be used as a standard for X-ray emission
	observed with delta-rays in 1731
	M. Fierz
	Gamow-Teller interactions

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

	s-waves
	the sum of the spins
	neutrinos
	Pauli's exclusion principle
	radio waves
	deuterium

9 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.

	TRUE
	FALSE

10 Which of the following are associated with electromagnetics?

	charge neutralization
	angular momentum transfer
	solar wind
	protons
	electrons
	the baryon neutrino

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

	TRUE
	FALSE

12 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

13 Yes or No, The force of gravity is the first astronomical source of the remnant nuclear force.

	Yes
	No

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

.

15 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

16

For standard basis, or unit, vectors (i, j, k) and vector components of a (a_x, a_y, a_z), 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 $a={\sqrt {a_{x}^{2}+a_{y}^{2}+a_{z}^{2}}}$
	if ax equals ay equals az, then the declination is -45°
	if ax equals ay equals az, then the declination is +45°

17 Which of the following are associated with the envelope of the polarization current density?

	emission of electromagnetic radiation from a superluminal charged particle
	intensity of some components decays as the inverse of the distance from the source
	non-spherically-decaying sources
	emission contains very high frequencies not present in the synthesis of the source
	non-spherically decaying components of the radiation do not violate energy conservation
	strong electromagnetic fields are compensated by weak fields elsewhere

Hypotheses

Main resource: Hypotheses

1. The weak interaction is also a function of the number of interferences (very few) and the distance exponent.

See also

• Astrophysics/Quiz
• Electromagnetic interaction/Quiz
• Electroweak interaction/Quiz
• Radiation/Quiz
• Strong interaction/Quiz

External links

• NASA's National Space Science Data Center
• Office of Scientific & Technical Information
• The SAO/NASA Astrophysics Data System
• Scirus for scientific information only advanced search
• Spacecraft Query at NASA

{{Physics resources}}{{Radiation astronomy resources}}