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alexira [117]
4 years ago
7

12-32 The Clear Brook High School band is holding a car wash as a fund-raiser to buy new equipment. The average time to wash a c

ar is 4 minutes, and the time is exponentially distributed. Cars arrive at a rate of one every 5 minutes (or 12 per hour), and the num- ber of arrivals per time period is described by the Poisson distribution. (a) What is the average time for cars waiting in the line (b) What is the average number of cars in the line? (c) What is the average number of cars in the system? (d) What is the average time in the system? (e) What is the probability there are more than three cars in the system?
Engineering
1 answer:
goldenfox [79]4 years ago
4 0

Answer:

69

Explanation:

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Heat is transferred at a rate of 2 kW from a hot reservoir at 875 K to a cold reservoir at 300 K. Calculate the rate at which th
blsea [12.9K]

Answer:

The correct answer is 0.004382 kW/K, the second law is a=satisfied and established because it is a positive value.

Explanation:

Solution

From the question given we recall that,

The transferred heat rate is = 2kW

A reservoir cold at = 300K

The next step is to find the rate  at which the entropy of the two reservoirs changes is kW/K

Given that:

Δs =  Q/T This is the entropy formula,

Thus

Δs₁ = 2/ 300 = 0.006667 kW/K

Δs₂ = 2 / 875 =0.002285

Therefore,

Δs = 0.006667 - 0.002285

= 0.004382 kW/K

Yes, the second law is satisfied, because it is seen as positive.

8 0
4 years ago
In what flight condition is torque effect the greatest in a single-engine airplane?
Tema [17]

Answer:

Low airspeed, high power, high angle of attack

7 0
2 years ago
The air in a room has a pressure of 1 atm, a dry-bulb temperature of 24C, and a wet-bulb temperature of 17C. Using the psychrome
TEA [102]

Answer:

(a) Relative Humidity = 48%,

Specific humidity = 0.0095

(b) Enthalpy = 65 KJ/Kg of dry sir

Specific volume = 0.86 m^3/Kg of dry air

(c/d) 12.78 degree C

(e) Specific volume = 0.86 m^3/Kg of dry air

8 0
3 years ago
Why doesn’t the servant kill the child oedipus as he was ordered to do
Anni [7]
The Servant does not kill the child Oedipus as he was ordered to do because "He pitied the child" based on the Oedipus Rex story. The servant was ordered to kill the child because of the prophecy that predicted King Laius' death. The king already had attempted to hurt Oedipus by piercing Oedipus's ankle. However, the servant did not finish the job and he rather saved the baby Oedipus.
6 0
3 years ago
A hollow steel cylinder with an outside diameter of 100 mm is required to carry a tensile load of 500 kN. Given that the allowab
ivolga24 [154]

Answer:

Maximum inside diameter is 68.52 mm.

Explanation:

Apply stress formula to calculate inside diameter of the tube. Take the allowable stress for safe design and maximum inside diameter of the steel tube.

Step1

Given:

Outside diameter is 100 mm.

Tensile load is 500 kN.

Allowable stress is 120 Mpa.

Calculation:

Step2

Inside diameter is calculated by the stress formula as follows:

\sigma_{a}=\frac{F}{A}

\sigma_{a}=\frac{F}{\frac{\pi}{4}(d_{o}^{2}-d_{i}^{2})}

120=\frac{500\times1000}{\frac{\pi}{4}(100^{2}-d_{i}^{2})}

(100^{2}-d_{i}^{2})=5305.164

d_{i}=68.52mm

Thus, the inner diameter is 68.52 mm.

6 0
3 years ago
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