According to the way the layers of Earth's atmosphere are defined in the following figures, the atmosphere of Venus has only _________ distinct layer(s).
a. one
b. two
c. three
d. four
e. five
b. two
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Using the standard steam tables, calculate the coefficient of thermal expansion, ?, from its definition for steam at 450°C and pressures of 10 kPa and 1 MPa. Then compare your results with the value obtained by assuming that steam is a perfect gas and explain the difference.
GIVEN
• Steam
• Temperature = 450°C = 723 K
FIND
The coefficient of thermal expansion at 10 kPa and 10 MPa from
(a) Standard Steam tables
(b) Perfect Gas Law
PROPERTIES AND CONSTANTS
From steam tables
The wave speed in an aluminum wire with a radius of 1.00 mm is 120 m/s. What is the tension in the wire? The density of aluminum is 2.70 × 103 kg/m3
A) 112 N B) 100 N C) 134 N D) 427 N E) 122 N
John throws a baseball from the outfield from shoulder height, at an initial velocity of 39.2 m/s at an initial angle of 30.0° with respect to the horizontal. The ball is in its trajectory for a total interval of 4.00 s before the third baseman catches it at an equal shoulder-height level. (Assume air resistance is negligible.) What is the ball's horizontal displacement?
a. 76.4 m c. 136 m b. 38.2 m d. zero
Clouds denoted by the prefix "alto" are
A) high clouds that form about 6000 meters above the ground. B) middle clouds that form 2000 to 6000 meters above the ground. C) low clouds that form 1000 to 2000 meters above the ground.