A latent load is a load which mainly involves a change in …………..... Select one: Temperature Enthalpy Humidity ratio Relative humidity
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A latent load is a load which mainly involves a change in ………….....
Select one:
- Temperature
- Enthalpy
- Humidity ratio
- Relative humidity
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- #1. Consider a lake in Vermont at the end of summer. At the end of summer, you can assume the average surface water temperature is about 20 °C and the bottom of the lake is about 10 °C. Explain in detail what happens as the cold air of winter arrives. Be sure to discuss in detail how various heat transfer mechanisms are working.HW1. Due: 02/08/2024. 1. The density of dry air at p = 1.0 bar and T =300 K is 1.161 kg/m³. Assuming it consists entirely of N₂ and O₂ and using the ideal gas law, determine the amount of each gas in moles in a volume of 1 m³ and their mole fractions. 2. (a) Calculate the amount of gas in moles per cubic meter of atmosphere at p = 1 atm and T = 298 K using the ideal gas equation. (b) The atmospheric content of CO₂ is about 360 ppmv (parts per million by volume). Assuming a pressure of 1.00 atm, estimate the amount of CO₂ in a 10.0 km layer of the atmosphere at the surface of the earth. The radius of the earth is 6370 km. (The actual amount of CO₂ in the atmosphere is about 6.0 x 1015 mol.) 3. The van der Waals parameter b is a measure of the volume excluded due to the finite size of the molecules. Estimate the size of a single molecule from the data given below. STATES OF MATTER AND THE VAN DER WAALS EQUATION Table 1.1 Van der Waals constants a and b and critical constants T.. p, and V…Initially the volume of a gas is 0.5m3 and the pressure is 30000Pa. If the gas is then isovolumetrically pressurized so that P2=2.5P1, what is the new volume of the gas? a) 0.25m3 b) 0.15m3 c) 0.5m3 d) 3m3 e) 2.5m3
- The lowest outdoor temperature ever recorded on Earth is - 128.6°F. What is this temperature on the Celsius and Kelvin scales? elsius A) -36.2°C, 183.9K B)-75.2°C, 282.9K C) 53.6°C, 219.5K D) -89.2°C, 183.9KiWhat type of air mass do you think would be responsible for cold, dry winter weather in Ireland? a.mT b.cT c.cP d.mP iiWhich of the following statements about specific humidity is TRUE? Select one: a.specific humidity changes as a given mass of air expands b.specific humidity is also known as relative humidity c.specific humidity is measured in grams of water vapour per kilogram of air d.specific humidity changes as a given mass of air is compressed.. 9. What volume is occupied by 200 grammes of oxygen (O2) at a pressure of P = 95 000 N/m2 and a temperature of 30°C? A) 146 liters B) 166 liters C) 186 liters D) 196 liters
- 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'dOn the KuyaWill temperature scale, the freezing point of water is -26°KW and the boiling point in 78°KW. The highest temperature in Metro Manila, 38.5°C was recorded on May 14, 1987. what is its equivalent in the Kuyawill temperature scale? Round off answer to the nearest whole number, ANSWER: OKW A Moving to the next question prevents changes to this answer. Question 14. a) Two bottles, A and B, are exposed to sunlight for three hours. Bottle A is deformed after the exposure and the measured temperature of both bottles' surfaces is 80°C. There are only two type of polymers, poly(ethylene terephthalate) and polycarbonate, to be used to make the bottles. By using the information provided in Table Q4(a), identify with reason the type of polymer that can be used to make: i. Bottle A ii. Bottle B Table Q4(a) Materials Оperating Temperature (°C) Glass Transition Temperature (C) Poly(ethylene terephthalate) (PET) Polycarbonate (PC) b) Outline the differences between Fig. 4(i) and Fig. 4(ii). 80 69 80 150 Fig. Q4(i) Fig. Q4(ii)
- 17. Balloons used helium at atmospheric pressure 101.325kPa and temperature 26°C. It is projected to lift and move logs from almost distant forest areas by means of balloons. What minimum balloon diameter will be required for a gross to move upward force of 30metric tons? a. 37.1934m b. 37.3607m c. 37.3190m d. 37.40226m9. A fitness club hires you to talk to their clients about the biomechanics of exercise. One of the clients likes to walk stairs at her office during her lunch hour for exercise. She wants to know if she can burn off the calories from one candy bar (180 kilocalories) by climbing up 1,500 steps of stairs. One kilocalorie equals 4,184 Joules. She weighs 65 kg and the height of one stair is 20 cm. The gross efficiency of her positive work is 25%.A bowl of warm water at 46°C was placed in the refrigerator. After 10 minutes the temperature of the water was 39°C. After 10 minutes, the temperature of the water dropped to 33°C. In the light of this information and according to Newton's law of cooling, how many degrees Celsius is the temperature of the refrigerator. Please choose one: a. -7 b. -6 c. -4 D. -5 to. -3