The density of a column of air decreases as altitude increases because
A. Air contracts as pressure decreases
B. Air expands as pressure decreases
C. Nonsense, the density of air is constant.
D. Nonsense, the density of air increases as altitude increases.
B. Air expands as pressure decreases
You might also like to view...
Compared with sea-level cooking, in cooking eggs by boiling in mountain regions you should boil the eggs
A) with a hotter flame. B) for a shorter time. C) for a longer time. D) all of the above E) none of the above
Mass Sprectrometer: The figure shows a mass spectrograph that is operated with deuterons, which have a charge of +e and a mass of 3.34 × 10-27 kg. The deuterons emerge with negligible velocity from the source, which is grounded. The speed of the deuterons as they pass through the accelerator grid is 8.0 × 105 m/s. A uniform magnetic field of magnitude B = 0.20 T, directed out of the plane, is present to the right of the grid and is perpendicular to the velocity of the deuterons. The deuterons make a circular orbit in the magnetic field. What is the radius of this orbit, and what is the initial direction of their deflection just as they enter the magnetic field? (e = 1.60 × 10-19 C)
style="vertical-align: 0.0px;" height="219" width="380" /> A. 62 mm, upward B. 71 mm, upward C. 62 mm, downward D. 69 mm, downward E. 84 mm, downward
Which of the following is not one of the three major types of seawater movement?
a. Waves b. Tides c. Currents d. Creep
All radio telescopes are refracting telescopes
Indicate whether the statement is true or false