Europa may have a subsurface ocean of liquid water due to
A) the insulating properties of its icy surface
B) tidal heating from Jupiter and the other Galilean moons
C) internal heat left over from its formation
D) tidal heating from the Sun
B
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A spherical flask, 4 m diameter with a 5 mm thick wall, is used to heat grape juice. During the heating process the outside surface of the flask is 100ºC and the inside surface is 80ºC. Estimate the thermal resistance of the flask, the heat transfer through the flask, if it is assumed that only the bottom half is heated, and the temperature distribution through the flask wall.
What will be an ideal response?
The 21-cm line of hydrogen is strongly absorbed by interstellar dust
Indicate whether the statement is true or false
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C As the ice is melting, the temperature of the ice-water mixture rises by
a. 0°C. b. +5°C. c. –5°C. d. +10°C. e. –10°C.
Where groundwater discharges to a swamp, the elevation of the water table next to the swamp is
A) lower than the surface of the swamp. B) at the same elevation as the surface of the swamp. C) slightly higher than the surface of the swamp. D) Not enough information is given.