A building, 20 m wide × 25 m long × 5 m high is ventilated at...
A building, 20 m wide × 25 m long × 5 m high is ventilated at a rate of 200 m3/h. The inflow air contains CO2 at a concentration of 0.6 g/m3. There is an internal source of CO2 in the building of 500 g/h. What is the mass of CO2 in the building and the exit CO2 concentration?
Homework Answers
a typical room is 4.0 m long, 5.0 m wide, and 2.5 m high. what is...
a typical room is 4.0 m long, 5.0 m wide, and 2.5 m high. what is the total mass of oxygen in the room assuming that the gas in the room is STP and that air contains 22% oxygen and 79% nitrogen? is by volume
A small ferryboat is 25 m long and 10 m wide. When a container is loaded...
A small ferryboat is 25 m long and 10 m wide. When a container is loaded on it, the ferryboat sinks an additional 5 cm. What is the mass of the container (density of slated water = 1050 kg /m3)? A)13,125 kg B)36,750 kg C)175,980 kg D)26,250 kg
A 25-mile-long, 9-yard-wide, two-lane highway (each lane 4.5 yard) is to be paved with a 5...
A 25-mile-long, 9-yard-wide, two-lane highway (each lane 4.5 yard) is to be paved with a 5 cm thick layer of asphalt. A fleet of three dump-trucks is to be employed, each with an empty mass of 20 metric tons and a carrying capacity of 20 m3. Asphalt with a density of 0.72 g/cm3 will be used Determine a) the total volume of asphalt needed in m3 b) the number of dump-truck loads required c) the gross mass of each truck...
1. A fish tank has dimensions 46 cm wide by 1.0 m long by 0.60 m...
1. A fish tank has dimensions 46 cm wide by 1.0 m long by 0.60 m high. If the filter should process all the water in the tank once every 3.0 h, what should the flow speed be in the 3.0-cm-diameter input tube for the filter? Express your answer to two significant figures and include the appropriate units. 2. What is the approximate mass of air in a living room 4.9m×4.0m×2.8m? The density of air is 1.29 kg/m3. Express your...
A 5 m long x 1m wide horizontal plate is heated on top and insulated on...
A 5 m long x 1m wide horizontal plate is heated on top and insulated on the bottom. The plate is maintained at 200 C. The air and walls of the room are maintaine d at 25°C. Determine the heat transfer by nature convection and radiation heat transfer. Assume an emissivity of 0.8.
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water....
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water. The interfacial temperature is 20°C. The initial temperature of the air is 25% and its velocity is 0.1 5 m/s. 1. Calculate the average mass transfer coefficient for water in the air in m/s. 2. Calculate the molar concentration of water in the air at the water-air interface in mol H20/m3 Calculate the molar concentration of water in the air far from the interface...
1. Consider a 1.2-m-high and 2-m-wide double-pane window consisting of two 3-mm a W/m C) separated...
1. Consider a 1.2-m-high and 2-m-wide double-pane window consisting of two 3-mm a W/m C) separated by a 12-mm-wide stagnant air space thick layers of glass ( 0.78 (0.026 W/m C). Determine the steady rate of heat transfer through this double- pane window and the temperature of its inner surface for a day during which the room is maintained at 24 C while the temperature of the outdoors is 5 C. Take the convection heat transfer coefficients on the inner...
A 5-m-wide. 5-m-high rectangular plate blocks the end of a 4.m-deep freshwater channel, as shown in...
A 5-m-wide. 5-m-high rectangular plate blocks the end of a 4.m-deep freshwater channel, as shown in the figure. The plate is hinged about a horizontal axis along its upper edge through a point A and is restrained from opening by a fixed ridge at point B. Determine the forge exerted on the plate by the ridge BE) (25 pts) )water = 9810 I m rI For a vertical rectangular wall the resultant force is applied at one third of depth...
Question 8 10 pts Aflat plate is 0.3 m long and 1m wide, Air at 20...
Question 8 10 pts Aflat plate is 0.3 m long and 1m wide, Air at 20 C flows over one surface with a velocity of 25 m/s. The total drag force on the plate is 0.17 N 0.14 N 0.21N 0.10 N Question 9 10 pts If the plate in problem 8 was made 10 percent longer, the drag coefficient would decrease not enough information to determine increase stay the same
Thermal Resistance Analysis: Consider a 1.2 m high and 1.4 m wide double-pane window consisting o...
Thermal Resistance Analysis: Consider a 1.2 m high and 1.4 m wide double-pane window consisting of two 4 mm thick layers ofglass (k-0.85 W m-K) separated by a 8-min stagnant air space. (k= 0.025 W m-K) Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner and outer surfaces on a day when the inside room temperature is maintained at 20 °C and the outside ambient temperature is 32 °C. Assume the convection...
A 25-mile-long, 9-yard-wide, two-lane highway (each lane 4.5 yard) is to be paved with a 5 cm thick layer of asphalt. A fleet of three dump-trucks is to be employed, each with an empty mass of 20 metric tons and a carrying capacity of 20 m3. Asphalt with a density of 0.72 g/cm3 will be used Determine a) the total volume of asphalt needed in m3 b) the number of dump-truck loads required c) the gross mass of each truck...
A 5 m long x 1m wide horizontal plate is heated on top and insulated on the bottom. The plate is maintained at 200 C. The air and walls of the room are maintaine d at 25°C. Determine the heat transfer by nature convection and radiation heat transfer. Assume an emissivity of 0.8.
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water. The interfacial temperature is 20°C. The initial temperature of the air is 25% and its velocity is 0.1 5 m/s. 1. Calculate the average mass transfer coefficient for water in the air in m/s. 2. Calculate the molar concentration of water in the air at the water-air interface in mol H20/m3 Calculate the molar concentration of water in the air far from the interface...
1. Consider a 1.2-m-high and 2-m-wide double-pane window consisting of two 3-mm a W/m C) separated by a 12-mm-wide stagnant air space thick layers of glass ( 0.78 (0.026 W/m C). Determine the steady rate of heat transfer through this double- pane window and the temperature of its inner surface for a day during which the room is maintained at 24 C while the temperature of the outdoors is 5 C. Take the convection heat transfer coefficients on the inner...
A 5-m-wide. 5-m-high rectangular plate blocks the end of a 4.m-deep freshwater channel, as shown in the figure. The plate is hinged about a horizontal axis along its upper edge through a point A and is restrained from opening by a fixed ridge at point B. Determine the forge exerted on the plate by the ridge BE) (25 pts) )water = 9810 I m rI For a vertical rectangular wall the resultant force is applied at one third of depth...
Question 8 10 pts Aflat plate is 0.3 m long and 1m wide, Air at 20 C flows over one surface with a velocity of 25 m/s. The total drag force on the plate is 0.17 N 0.14 N 0.21N 0.10 N Question 9 10 pts If the plate in problem 8 was made 10 percent longer, the drag coefficient would decrease not enough information to determine increase stay the same
Thermal Resistance Analysis: Consider a 1.2 m high and 1.4 m wide double-pane window consisting of two 4 mm thick layers ofglass (k-0.85 W m-K) separated by a 8-min stagnant air space. (k= 0.025 W m-K) Determine the steady rate of heat transfer through this double-pane window and the temperature of its inner and outer surfaces on a day when the inside room temperature is maintained at 20 °C and the outside ambient temperature is 32 °C. Assume the convection...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago