Draft:Electrostatic suspension/Quiz

The image is an artist concept of Gravity Probe B spacecraft in orbit around the Earth. Credit: NASA/MSFC.

Electrostatic suspension is a lecture in the repellor vehicle series.

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Quiz

<quiz>

{The equation for the ion current is likely to include which of the following? |type="()"} - the mass of the electron - the number of electrons - e to the grain capacitance factor + the dust grain radius - a 4πr factor

{True or False, A calculation of energy is not possible unless a mass is involved. |type="()"} + TRUE - FALSE

{Which of the following is not an electron volt? |type="()"} + 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

{Which of the following are phenomena associated with electromagnetic cascades? |type="[]"} + spectral and timing properties of astronomical sources + very high-energy γ-rays + the way from the source to the Earth - soft X-rays - redshifts + ambient radiation fields inside the γ-ray source - source stability - protons

{True or False, A unit vector is a direction with a magnitude of one. |type="()"} + TRUE - FALSE

{Which of the following may not be able to slow down an object entering the heliosphere at 20 km/s? |type="()"} + gravity - electrostatic repulsion - the charge on the surface of the Sun - a comparable charge on the incoming object - electromagnetics - strong forces

{True or False, For the photosphere to have a net negative charge and interstellar electrons to be streaming into the solar system, the sign of the voltage at the Sun is positive. |type="()"} + TRUE - FALSE

{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. |type="()"} + TRUE - FALSE

{Which of the following are associated with electromagnetics? |type="[]"} + angular momentum transfer + solar wind + protons + electrons - the baryon neutrino + charge neutralization

{Which of the following are associated with the envelope of the polarization current density? |type="[]"} + 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

{If energy is the impetus behind all motion and activity, which of the following are associated with power? |type="[]"} - 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

{Complete the text: |type="{}"} Match up the radiation mathematics symbol with the radiation phenomena: thermal neutron capture rate - A change in particle diameter - B power law - C Planck constant - D Boltzmann constant - E electrostatic force - F Jeans length - G $h$ { D (i) }. ${\lambda }_J$ { G (i) }. ${\phi }_n$ { A (i) }. $F_q$ { F (i) }. $a{x}^k$ { C (i) }. $k_B$ { E (i) } $C_D$ { B (i) }. Template:Clear

</quiz>

Hypotheses

1. Questions linking the various fields overlapping electrostatic suspension make differentiating questions.

See also

• Planetary science/Quiz
• Radiation astrochemistry/Quiz
• Radiation astrogeography/Quiz
• Radiation astrohistory/Quiz
• Radiation astronomy/Quiz
• Theoretical radiation astronomy/Quiz

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