What color are the stars with the hottest photosphere?
a. White
b. Yellow
c. Red
d. Blue
d
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Ideal incompressible water is flowing in a drainage channel of rectangular cross-section. At one point, the width of the channel is 12 m, the depth of water is 6.0 m, and the speed of the flow is 2.5 m/s
At a point downstream, the width has narrowed to 9.0 m, and the depth of water is 8.0 m. What is the speed of the flow at the second point? A) 2.0 m/s B) 2.5 m/s C) 3.0 m/s D) 3.5 m/s E) 4.0 m/s
What is a species worth? How do we balance economics and ethics? Are there values other than economic that are important? Explain
What will be an ideal response?
The graph below indicates the temperature of Saturn's atmosphere as a function of distance from the upper cloud layer. Water will condense to form droplets at a temperature of approximately 270 K in the atmosphere of Saturn. At what distance from the upper cloud layer will clouds of water vapor form?
a.
-250 km
b.
-150 km
c.
0 km
d.
150 km
e.
250 km
The moon with a mass of 
kg is orbiting about the earth with a mass of 
kg at a radius of 
meters. The earth is orbiting about the sun with a mass of 
kg at a radius of 
meters. The force of gravity on the moon when it is between the earth and the sun is 
A. 
N toward the sun.
B. 
N toward the earth.
C. 
N toward the sun.
D. 
N toward the earth.
E. 
N toward the earth.