Ask question

# A building code requires one square foot (sq ft) of net-free vent area (NFVA) for every 300 sq ft of attic space. How many square feet of NFVA are required for a 1620-sq-ft attic?

Question
Discrete math
asked 2021-02-12
A building code requires one square foot (sq ft) of net-free vent area (NFVA) for every 300 sq ft of attic space. How many square feet of NFVA are required for a $$\displaystyle{1620}-{s}{q}-{f}{t}$$ attic?

## Answers (1)

2021-02-13
Multiply by the area of the attic by the conversion factor: $$\displaystyle{1}{s}{q}{f}{t}{o}{f}{N}{F}{V}\frac{{A}}{{300}}{s}{q}{f}{t}$$ of attic space: PSK $$\displaystyle{1620}{s}{q}{f}{t}\cdot\frac{{{1}{s}{q}{f}{t}{o}{f}{N}{F}{V}{A}}}{{{300}{s}{q}{f}{t}{o}{f}{a}{\mathtt{{i}}}{c}{s}{p}{a}{c}{e}}}={5.4}{s}{q}{f}{t}$$ of NFVA

### Relevant Questions

asked 2021-03-12
A 75.0-kg man steps off a platform 3.10 m above the ground. Hekeeps his legs straight as he falls, but at the moment his feettouch the ground his knees begin to bend, and, treated as aparticle, he moves an additional 0.60 m before coming torest.
a) what is the speed at the instant his feet touch theground?
b) treating him as a particle, what is his acceleration(magnitude and direction) as he slows down, if the acceleration isassumed to be constant?
c) draw his free-body diagram (see section 4.6). in termsof forces on the diagram, what is the net force on him? usenewton's laws and the results of part (b) to calculate the averageforce his feet exert on the ground while he slows down. expressthis force in newtons and also as a multiple of his weight.
asked 2021-04-24
The following is an 8051 instruction: CJNE A, # 'Q' ,AHEAD
a) what is the opcode for this instruction?
b) how many bytes long is this instruction?
c) explain the purpose of each byte of this instruction.
d) how many machine cycles are required to execute this instruction?
e) If an 8051 is operating from a 10 MHz crystal, how longdoes this instruction take to execute?
asked 2020-11-07
A farmer has a vegetable garden which is 35 feet wide by 80 feet long. The farmer wishes to divide the garden equally between tomatoes, peppers, and cabbage. However, the farmer would like to keep a one-foot border around the garden free for a fence. How many square feet can be used for the tomato planting?
asked 2021-05-12
Your town is installing a fountain in the main square. If thewater is to rise 25m(82feet)above the fountain,how much pressuremust the water have as it moves slowly toward the nozzle thatsprays it up into the air?
Rather than putting a pump in the fountain(previous question)the engineer puts a water storage tank in a nearby high risebuilding.How high up in that building should the tank be for itswater to rise 25m when spraying out thefountain?(neglect friction)
asked 2021-02-14
Dayton Power and Light, Inc., has a power plant on the Miami Riverwhere the river is 800 ft wide. To lay a new cable from the plantto a location in the city 2 mi downstream on the opposite sidecosts $180 per foot across the river and$100 per foot along theland.
(a) Suppose that the cable goes from the plant to a point Q on theopposite side that is x ft from the point P directly opposite theplant. Write a function C(x) that gives the cost of laying thecable in terms of the distance x.
(b) Generate a table of values to determin if the least expensivelocation for point Q is less than 2000 ft or greater than 2000 ftfrom point P.
asked 2021-04-11
The equation F=−vex(dm/dt) for the thrust on a rocket, can also be applied to an airplane propeller. In fact, there are two contributions to the thrust: one positive and one negative. The positive contribution comes from air pushed backward, away from the propeller (so dm/dt<0), at a speed vex relative to the propeller. The negative contribution comes from this same quantity of air flowing into the front of the propeller (so dm/dt>0) at speed v, equal to the speed of the airplane through the air.
For a Cessna 182 (a single-engine airplane) flying at 130 km/h, 150 kg of air flows through the propeller each second and the propeller develops a net thrust of 1300 N. Determine the speed increase (in km/h) that the propeller imparts to the air.
asked 2021-03-11
The following problem is solved by using factors and multiples and features the strategies of guessing and checking and making an organized list.
Problem
A factory uses machines to sort cards into piles. On one occasion a machine operator obtained the following curious result.
When a box of cards was sorted into 7 equal groups, there were 6 cards left over, when the box of cards was sorted into 5 equal groups, there were 4 left over, and when it was sorted into 3 equal groups, there were 2 left.
If the machine cannot sort more than 200 cards at a time, how many cards were in the box?
asked 2021-03-30
A spring gun projects a golf ball at an angle of 45 degreesabove the horizontal. The ball has horizontal range of 32 feet.what is the maxium height to which the ball can rise? and what are2 angles for the range is 20 ft.
asked 2021-02-16
Three building materials, plasterboard [k = 0.30 J/(s m Co)], brick [k = 0.60 J/(s m Co)], and wood [k = 0.10 J/(s m Co)], are sandwiched together as the drawing illustrates. The temperatures at the inside and outside surfaces are $$\displaystyle{25.1}^{\circ}$$ C and $$\displaystyle{0}^{\circ}$$ C, respectively. Each material has the same thickness and cross-sectional area. Find the temperature (a) at the plasterboard-brick interface and (b) at the brick-wood interface.
asked 2021-03-07
Ariel's bedroom is 170in long, 135in wide, and 8.3 ft high. Her bedroom has two windows that measure 15 sq.ft. each and a door that measures 20 sq.ft. Ariel and her daughter, Melody, are going to paint Ariel's bedroom. It is given that 1 gallon of paint covers 150 sq.ft. How many gallons of paint are needed to paint the four walls and the ceiling of Ariel's bedroom with one coat of paint? Round your final answer to two decimals places.
...