Question

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Name- Date Chapter 6 Laboratory Exercises 1. Consider the Coriolis force in the Southern Hemisphere and its effect on wind direction Following arguments similar to those given in the text (and in Figure 6.25) for the Northerm Hemisphere., (a) explain why the deflection resulting from the Coriolis force in the Southern Hemisphere is to the left. (b) Draw an area of low pressure with a few closed isobars. Label the isobars with realistic values of sea-level pressure. Then draw a dozen or so arrows to show how the winds blow with respect to the isobars in the Southern Hemisphere. Repeat this procedure for an area of high pressure in the Southern Hemisphere. 2. Figure 6.41 shows two patterns of isobars (Jabeled in mb), On each pattern, draw a dozen or so arrows to show how the wind would blow if the earth didn't rotate (that is, if there was no Coriolis force). Assume you're in the Northern Hemisphere. 3. The Gas Law is a fundamental relationship linking the pressure, temperature, and density of a gas. The Gas Law can be written as: Pressure Constant x Density x Temperature If temperature is expressed in Kelvins, density in kilograms per cubic meter (kg/m), and the constant is taken as 287 (its units would be m2/s K), then pressure will be in units of Pascals, where 100 Pa-1 mb. (a) Calculatea typical air density at the surface of the Earth, assuming an air temperature of 68°F (293 K) and. P ioco 506,000 P 106,Coo 2.87x D243 (b) Calculate the mass of the air in a room that is 6 m wide, 5 m long, and 3 m high. Assume an air temperature of 77°F (298 K) and average sea-level pressure. (Hint: Density is mass per unit volume.) average sea-level pressure. 1000 1020 1016 1024 1004 1012 1028, I 1008 H 1012 (b) (a) FIGURE 6.41Laboratory Exercise 2.Two pattens of isobars (labeled in mb).

Answer 1

1(a) It is due to the apparent force that acts on the moving objects causing the object to suddenly change the direction to the left in the southern hemisphere. Actually, the thing that happens is given in the picture below, if a person stands at some point along with the flow of current in the southern hemisphere facing the direction of current moving then the current suddenly changes its direction towards the left-hand side of the observer. This happens as a result of the rotation of Earth.

Nortz henaisphere, dofectio niget of te olosooer to the Clesenoer $zuotor defleation ma Olbsirves uteshn hemispesae 1 deflectio bs2te tea aft of tte oleserArer & iycesiolis fbect at varrous point

1(b) H & L indicates high and low pressure respectively. The winds move out in a counter-clockwise direction from the low-pressure zone and inward in the clockwise direction in the high-pressure zone. Both the images are given below.

t020 -1o16 - 10 12

989 980 6
2.The same thing happens as happens in the southern hemisphere with Coriolis force. See answer 1(b).

1000 1004 1008 1012 AAAA

In this pattern the arrows are shown as such that the wind is moving from lower pressure to higher pressure, it is just the representative version of the previous image of the question showing just a straight line pattern because if we notice we can see the exactly same thing happening, the wind is blowing from the low pressure region towards the high pressure region.

3(a). Average sea level pressure (P) = 1,000 Mb = 100000 Pa , C = 287 and T = 293 K

P = C*D*T

100000 = 287*D*293

D = 100000/(293*287) = 1.1891879 kg/m³

(b) Average sea level pressure (P) = 1,000 Mb = 100000 Pa , C = 287 and T = 298 K

100000 = 287*D*298

D = 100000/(298*287) = 1.169235 kg/m³

Density = Mass/Volume

V = 6*5*3 = 90 m³

Mass = D*V = 1.169235*90 = 105.23115‬ Kg