If you were ascending from the surface of Earth to the top of the atmosphere, which one of the following would be most useful for determining the layer of the atmosphere you were in? Explain. a. Doppler radar b. Hygrometer (humidity) c. Weather satellite d. Barometer (air pressure) e. Thermometer (temperature)

What are the standard time and date at (40N, 118W) when the standard time at (35N, 80W) is 6 p.m. on October 8?

In the chapter on fluid mechanics, Bernoulli's equation for the flow of incompressible fluids was explained in terms of changes affecting a small volume dV of fluid. Such volumes are a fundamental idea in the study of the flow of compressible fluids such as gases as well. For the equations of hydrodynamics to apply, the mean free path must be much less than the linear size of such a volume, adV1/3 . For air in the stratosphere at a temperature of 220 K and a pressure of 5.8 kPa, how big should a be for it to be 100 times the mean free path? Take the effective radius of air molecules to be 1.881011 m, which is roughly correct for N2.

Explain what the ionosphere is and how it interacts with some radio waves.

How does hydrostatic equilibrium relate to hot-air ballooning?

(a) In the deep space between galaxies, me density of atoms is as low as 106atoms/m3, and me temperature is a frigid 2.7 K. What is me pressure? (b) What volume (in m3) is occupied by 1 mol of gas? (c) If this volume is a cube, what is the length of its sides in kilometers?

A farmer wants to fence off his four-sided plot of flat land. He measures the first three sides, shown as A, B, and C in Figure 3.62, and then correctly calculates the length and orientation of the fourth side D. What is his result?

How many cubic meters of helium are required to lift a light balloon with a 400-kg payload to a height of 8 000 m? Take Hc = 0.179 kg/m3. Assume the balloon maintains a constant volume and the density of air decreases with the altitude z according to the expression pair = 0e-z/8 000, where z is in meters and 0 = 1.20 kg/m3 is the density of air at sea level.

If you wish to see your entire body in a flat minor (from head to toe), how tall should the minor be? Does its size depend upon your distance away from the mirror? Provide a sketch.

Oxygen reaches the veinless cornea of the eye by diffusing through its tear layer, which is 0.500-mm thick. How long does it take the average oxygen molecule to do this?