3. The dry adiabatic lapse rate, I'd≈1 K/100 m, and the moist (or saturated) adiabatic lapse rate, I'm depends on moisture content, but is approximated by I'm ≈ 0.5 K/100 m in the lower troposphere. (a) If a parcel has 50% relative humidity, what rate will it cool as it rises? (b) If a parcel has 100% relative humidity, what rate will it cool as it rises? I'm? (c) Why is I'd
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- If the relative humidity is 90.0% on a muggy summer morning when the temperature is 20.0C, what will it be later in the day when the temperature is 30.0C, assuming the water vapor density remains constant?Most automobiles have a coolant reservoir to catch radiator fluid than may overflow when 1he engine is hot. A radiator is made of copper and is filled to its 16.0L capacity when at 10.0C. What volume of radiator fluid will overflow when the radiator and fluid reach their 95.0C operating temperature, given that the fluid’s volume coefficient of expansion is =400106/C ? Note that this coefficient is approximate, because most car radiators have operating temperatures of greater than 95.0C.One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose a single-story cubical house already had 15 cm of fiberglass insulation in the attic and in all the exterior surfaces. If you added an extra 8.0 cm of fiberglass to the attic, by what percentage would the heating cost of the house drop? Take the house to have dimensions 10 m by 15 m by 3.0 m. Ignore air infiltration and heat loss through windows and doors, and assume that the interior is uniformly at one temperature and the exterior is uniformly at another.
- In Miami, Florida, which has a very humid climate and numerous bodies of water nearby, it is unusual for temperatures to rise above about 38 (100 F). In the desert climate of Phoenix, Arizona, however, temperatures rise above that almost every day in July and August. Explain how the evaporation of water helps limit high temperatures in humid climates.Because humidity depends only on water's vapor pressure and temperature, are the saturation vapor densities listed in Table 13.5 valid in an atmosphere of helium at a pressure of 1.01105N/m2 , rather than air? Are those values affected by altitude on Earth?For the human body, what is the rate of heat transfer by conduction through the body's tissue with the following conditions: the tissue thickness is 3.00 cm, the difference in temperature is 2.00 , and the skin area is 1.50 m2. How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)
- What are the following temperatures on the Kelvin scale? (a) 68.0 F, an indoor temperature sometimes recommended for energy conservation in winter (b) 134 F, one of the highest atmospheric temperatures ever recorded on Earth (Death Valley, California, 1913) (c) 9890 F, the temperature of the surface of the SunAn astronaut performing an extra-vehicular activity (space walk) shaded from the Sun is wearing a spacesuit that can be approximated as perfectly white ( e=0 ) except for a 5 cm × 8 cm patch in the form of the astronaut's national flag. The patch has emissivity 0.300. The spacesuit under the patch is 0.500 cm thick, with a thermal conductivity k 0.0600 W/m , and its inner surface is at a temperature of 20.0 . What is the temperature of the patch, and what is the rate of heat loss through it? Assume the patch is so thin that its outer surface is at the same temperature as the outer surface of the spacesuit under it. Also assume the temperature of outer space is 0 K. You will get an equation that is very hand to solve in closed form, so can solve it numerically with a graphing calculator, with software, or even by trial and error with a calculator.What are the main methods of heat transfer front the hot core of Earth to its surface? From Earth's surface to outer space? When our bodies get too warm, they respond by sweating and increasing blood circulation to the surface to transfer thermal energy away from the care. What effect will this have on a person in at 40.0C hot tub? Figure 14.30 shows a cutaway drawing of a thermos battle (also known as a Dewar flask), which is a device designed specifically to slow down all terms at heat transfer. Explain the functions of the various parts, such as the vacuum, the silvering of the walls, the thin-walled long glass neck, the rubber support, the air layer, and the stopper. Figure 14.30 The construction of a thermos bottle is designed to inhibit all methods of heat transfer.
- A-2.16. The heat capacity of air is much lower than the heat capacityof water and a relatively small amount of heat is sufficient to change its temperature. Is itone of the reasons why in deserts, despite the high temperature during the day, wit is bitter cold at night. Heat capacity of air in constant volume wroom temperature is approximately 21 J K-1 mol-1. How much heat is needed toIncrease the air temperature in a room of 5.5 mx 6.5 mx 3.0 m by 10 ° C? Howa 1.0 kW heater would have to be on for a long time to achieve this temperature change,if there was no heat lossOn a summer day in Houston, the temperature is 35 C and the realative humidity is 77 percent A) What is the humidity? B) To what temperature could the air be cooled before condensation starts to take place? (That is, what is the dew point?)GHANA SCHOC EXERCIS BOOK NOTE 1 ALEX MORGAN - An object of emisivity 07 and cooss- sectional of SSmm? ait room tempeiature area of 30 lasseS energy dt What is the initial temperature I o=5.6703 x 103 w/m/x+] a rate of 35.65/s. of the object?