Which planet has a ring system?
A) Neptune
B) Jupiter
C) Saturn
D) Uranus
E) All of the above
E
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How much heat (in kcal) must be removed to make ice at -10°C from 2 kg of water at 20°C? (The specific heat of ice is 0.50 cal/g×°C.)
a. 190 b. 200 c. 240 d. 210 e. 50
Sketch five isotherms and appropriate heat flow lines for heat transfer per unit depth through a 5 cm x 5 cm square where the heat flow is from a high temperature corner and another isothermal as the side of the square.
What will be an ideal response?
The visible parts of galaxies contribute about 10 percent of the critical density of the universe
Indicate whether the statement is true or false
As you watch a star, you see it move 15 degrees across the sky. How long have you been watching it?
A) 1 hour B) 1 minute C) 15 minutes D) 3 hours E) 15 seconds