Listed following are some of the distinguishing characteristics of the four Galilean moons of Jupiter. Match each characteristic to the appropriate moon.


Answer :
Io:
-volcanoes currently erupting
-hot, glowing lava visible in some photos
-source of ionized gas in the donut-shaped charged particle belt around Jupiter

Europa:
-double-ridged surface features strongly suggest a subsurface ocean below
-ice covered surface with few impact craters

Ganymede:
-largest moon in the solar system
-heavily cratered terrain adjacent to fairly smooth terrain

Callisto:
-most distant from Jupiter of these four moons
-entire surface appears heavily cratered and ancient

Physics & Space Science

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In the particle era, particles of matter outnumbered particles of antimatter by about 1 particle in one billion

Indicate whether the statement is true or false

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A cross-flow heat exchanger is used to heat mixed air from 20 ºC to 45ºC. Water at 75ºC enters the tube and leaves at 45ºC. If the overall heat transfer coefficient is 50 W/m^2?ºC and there is to be 30,000 W of heat exchanged, determine the necessary heat exchanger surface area and the mass flow of water.

What will be an ideal response?

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The most striking valley in the solar system is:

A) the Grand Canyon in Arizona. B) Gwenivere on Venus. C) the Discovery Scarp of Mercury. D) Valles Marineris on Mars. E) Valhalla on Callisto.

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The centroid of the semicircular segment shown in the figure below (b 5 6 in.) is at coordinates (x, y)(in.):

(A) 4.5, 3.0
(B) 6.0, 4.0
(C) 5.5, 3.5
(D) 6.0, 3.23

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