25. Four of the light bulbs in a box of ten bulbs are burnt out or otherwise defective. If two bulbs are selected at random without replacement and tested, what is the probability that exactly one defective bulb is found? O 24/90 O 30/90 O 12/90 O 48/90

Q: 3. Discuss the major techniques followed in highway for controlling emission.

A: Various techniques that is used to control vehicular emissions:

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A:

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A: Engineering, soil science, biology, and chemistry are used by environmental engineers to solve…

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A: Given,  Barometer installed on sunlight

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A:

Q: Assume a population of fish grows exponentially. A pond is stocked initially with 500 fish. After 6…

A: Given: Fish at beginning= 500, Fish at 6 months= 1000,

Q: Water flows from a hose bib at a rate of 15.8 gallons per minute. What is the rate in liters per…

A: Given data: Flow rate = 15.8 gallons per minute = 15.8 gallonsminute As we know, 1 gallon = 3.785412…

Q: Pointer 4 ghter Kil Sample Problem 4 Water 4. Calculate the head loss in this system. Pipe 0-100 mm…

A: The tank is opoen to atmosphere.Diameter of pipe, D=100mmVelocity at point 2, V2=60ms

Q: For a street lighting system, having the following conditions : Street width = 15 m Mounting height…

A: Given- Lamp lumen=6000 lumen, Width =15 m, COU=0.44, M factor=0.8. Average lux=6.

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A: To determine the speed of the ambulance.   Given, Source frequency, fs = 1740 Hz Speed of…

Q: A student began an experiment for the determination of 5-day, 20°C BOD on Monday. Since the 5th day…

A:

Q: For item 4 to 6. Table 3.8 shows the heights of a sample of 12 fathers and their oldest adult sons.…

A: Given data: Table 3.8 showing heights of fathers and their oldest adult sons n = 12  It is asked to…

Q: 100 kN 70 kN 50 kN B. 3 m 5 m 2 m 4 m

A: Given System of structures this is upper beam.

Q: How much energy we can save ? Energy needed to treat water Average energy use for water treatment…

A: Solution: The dishwasher and cloth washers are not taken. Recalculating the problem by considering…

Q: 13. A man wearing a bullet-proof vest stands on roller skates. The total mass is 80 kg. A bullet of…

A: m=80kg

Q: 3. Neglecting losses, find the discharge in gallon per minute through the venturimeter as shown…

A: Diameter of inlet (d1) = 300 mm = 0.3 m Diameter of throat (d2) = 150 mm = 0.15 m Head difference…

Q: An employee who works during 8-hour shift in a station is exposed to a noise level of 80 + T + U…

A: Given, A weighted sound level (L) = 80+9+2 = 91 dB(A)

Q: A container contains 200 g of solution in which 30 grams of salt are dissolved. Brine containing 1g…

A:

Q: A noise meter located at a distance of 30 m from a point source recorded 74 dB. The reading at a…

A: given- sound recorded by noise meter at location 1-L1=74 dBdistance of noise meter 1 from the point…

Q: Q1: Consider a 3 bedroom, 1,063 square meter single family home to which you would like to add…

A: No of bed room Nbr= 3 Area of the floor Afloor= 1063 sq m Whole building continuous ventilation rate…

Q: A noise meter located at a distance of 30 m from a point source recorded 74 dB. The reading at a…

A:

Q: Information about the level of CO present in the air is usually expressed in ppm, parts per million.…

A: Given data: Maximum limit recommended by the World Health Organization (WHO) = 9 ppm The information…

Q: A noise meter located at a distance of 30 m from a point source recorded 74 dB. The reading at a…

A: Given data: Distance of 1st noise meter, R1=30 m Distance of 2nd noise meter, R2=60 m Sound recorded…

Q: 18- Which of the following is not one of the error sources that can affect the measurement results?…

A: Which is not the source of error

Q: The highest recommended level of noise without the use of hearing protection is: 80 dBA O 85 dBA 90…

A: The correct option would be 85 decibels{db} and this is the option (b). This is in the accordance…

Q: r into a room or a car. A library atrium has an overhead skylight that lets in too much light during…

A:

Q: Besides energy savings, what are other advantages that observation of daylight saving time may…

A: The answer is below:

Q: An 1800 W toaster, a 1400 W electric frying pan, and a 75.0 W lamp are plugged into the same outlet…

A: To determine: voltage on each appliances current drawn by each appliance total current drawn if the…

Q: Calculate the weight, mass density, specific weight and specific gravity of an unknown liquid if…

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Q: VA = 0.6 m/s ав = ?

A:

Q: A thermometer reading 18 degF is brought into a room where the temperature is 70 deg F; 1 minute…

A: Let's  T = Thermometer temperature = 70°F S = temperature inside the room t = time passes

Q: 24. A radiator contains 9 quarts of a mixture of water and antifreeze. If 30% of the mixture is…

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Q: For every four seconds, 8.77E10^19 e- move past a given point in a circuit. How much current would…

A: To determine the current required to move the given charge and time.   Given, Charge that is to flow…

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A: Given,   G1 = -4%   G2 = 2%    L = 481.67 m

Q: 48 172' A/e Answer: Vo= ft/sec A17 311

A:

Q: 2. Air is leaking from a spherical-shaped advertising balloon at the rate of 26 cubic feet per…

A:

Q: Example 7: Each month, an American household generates an average of 28 pounds of newspaper for…

A: