If life is to develop on a planet, the planet must lie well outside its star's habitable zone, where water is in its icy form
a. True
b. False
Indicate whether the statement is true or false
False
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The lunar surface cools after the sun sets. This is an example of
a. heat conduction b. heat convection c. heat radiation d. thermal expansion e. none of the above
Which of the following is true of the central bulge in the Milky Way?
A) It is a slightly flattened spheroid. B) It is a part of the disk component of the galaxy. C) It consists of spiral arms. D) It is a highly active region for star formation.
Latent Heats: If you add 1.33 MJ of heat to 500 g of water at 50°C in a sealed container, what is the final temperature of the steam? The latent heat of vaporization of water is 22.6 × 105 J/kg, the specific heat of steam is 2010 J/kg ? K, and the specific heat of water is 4186 J/kg ? K.
A. 100°C B. 112°C C. 123°C D. 147°C E. 195°C
Conduction: A heat-conducting rod that is wrapped in insulation is constructed with a 0.15-m length of alloy A and a 0.40-m length of alloy B, joined end-to-end. Both pieces have cross-sectional areas of 0.0020 m2. The thermal conductivity of alloy B is known to be 1.8 times as great as that for alloy A. The end of the rod in alloy A is maintained at a temperature of 10°C, and the other end of the rod is maintained at an unknown temperature. When steady state flow has been established, the temperature at the junction of the alloys is measured to be 40°C, and the rate of heat flow in the rod is measured at 56 W. What is the thermal conductivity of alloy A?
A. 120 W/m ? K B. 125 W/m ? K C. 130 W/m ? K D. 135 W/m ? K E. 140 W/m ? K