The energy released from condensation in thunderstorms can be very large. Calculate the energy released into the atmosphere for a small storm of radius 1 km, assuming that 1.0 cm of rain is precipitated uniformly over this area.
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- One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a house. Suppose the 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, then by what percentage would the heating cost of the house drop? Take the single story house to be of dimensions 10 m by 15 m by 3.0 m. Ignore air infiltration and heat loss through windows and doors.In areas where the air temperature remains below 0°Cfor prolonged periods of time, the freezing of water in undergroundpipes is a major concern. Fortunately, the soil remainsrelatively warm during those periods, and it takes weeks for thesubfreezing temperatures to reach the water mains in the ground.Thus, the soil effectively serves as an insulation to protect thewater from the freezing atmospheric temperatures in winter.The ground at a particular location is covered with snowpack at 28°C for a continuous period of 60 days, and theaverage soil properties at that location are k 5 0.35 W/m·K anda = 0.15 * 10-6 m2/s. Assuming an initial uniform temperatureof 8°C for the ground, determine the minimum burialdepth to prevent the water pipes from freezing.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
- When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy that would raise your body temperature if it were not eliminated. The evaporation of perspiration is the primary mechanism for eliminating this energy. Determine the amount of water you lose to evaporation when running for 58 minutes at a rate that uses 400 kcal/h above your BMR. (That amount is often considered to be the "maximum fat-burning" energy output. The latent heat of vaporization of water at room temperature is 2.5 106 J/kg.) A) _________ kgB)The metabolism of 1 gram of fat generates approximately 8.63 kcal of energy and produces approximately 1 gram of water. (The hydrogen atoms in the fat molecule are transferred to oxygen to form water.) What fraction of your need for water will be provided by fat metabolism?______________ %To keep yourself warm in the winter, you heat a solid metal ball and place it on a stand in the center of your room. The ball has a radius of 17.0 cm and an emissivity of 0.830. If your room has a temperature of 15°C, what is the net power radiated by the ball initially, when the ball's temperature is 200°C?Gg.196. Please help me .....
- Calculate the amount of radiation emitted for a unit surface (1 m²) for the following situations. Express your answers in both SI units (in W) and U.S. Customary units (in Btu/h). (a) a hot pavement in Arizona at 52°C (125.6°F) and & ≈ 0.84 rate in W rate in Btu/h W Btu/h (b) a hood of a car at 44°C (111.2°F) and & ≈ 0.91 rate in W W rate in Btu/h Btu/h (c) a sunbather at 38°C (100.4°F) and & ≈ 0.91 rate in W W rate in Btu/h Btu/h2. (a) Derive an expression for the density p that results when an air parcel initially at pressure p, and density p, expands adiabatically to pressure p. [~ Holton 2.6] (b) An air parcel that has a temperature of 20°C at the 1000-hPa level is lifted dry adiabatically. What is its density when it reaches the 500-hPa level? [~ Holton 2.7]Calculate the depth (in km) to which Avogadro's number of table tennis balls would cover the Sun. Each ball has a diameter of 3.75 cm. Assume the space between balls adds an extra 35.6% to their volume and assume they are not crushed by their own weight.