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2 years ago

Select the correct answer.

Engineering

1 answer:

steposvetlana [31]2 years ago

8 0

Answer: Technical sales engineer

Explanation:

An analysis engineer makes use of data and other technical information in order for him or her to be able to analyze a project plan, and provide necessary solutions.

Technical sales engineers gives their clients the needed support and sales advice for their business to thrive. Technical sales engineers helps their clients in giving technical advices, answering queries, as well as introducing new products.

Design engineers are the engineers that study, and develop ideas that will be used for new products. Sometimes, they also modify systems used in production so that organizational performance can be improved.

Inspection engineers are the engineers that looks at infrastructures and identify the problems affecting them e.g oil pipelines, roads, bridges, etc so that accidents will be prevented.

Consulting engineer is an engineer that deals with the planning, and infrastructures. Their work benefits the society as a whole.

Based on the above explanation, the answer is technical sales engineer.

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Describe how the Rotary Engine works.

LekaFEV [45]

Answer:

Rotary engine was early known by the name of internal combustion engine. It convert heat from a high pressure of combustion. The main advantage of rotary engine is that it can be operate with less number of vibration. It works on the principle of converting pressure into rotating motion. In rotary engine the expansion pressure is applied on the flank rotor.

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2 years ago

From your cooling load (8890.007 Btu/hr = 2.605kW, determine mass flow rate of refrigerants. Use the following "rule of thumb" e

NeX [460]

Answer:

0.740833917 ton/hr

Explanation:

Given:

Cooling load, 8890.007 Btu/hr = 2.605 kW

Room size = 180 $ft^{2}$

According to the thumb rule

1 ton of refrigerant = 12000Btu

Hence for 8890.007 Btu/hr,

the mass flow rate of the refrigerant is =8890.007 / 12000

= 0.740833917 ton per hr

Hence, mass flow rate is 0.740833917 ton/hr

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3 years ago

9. A box contains (4) red balls, and (7) white balls ,we draw( two) balls with return , find 1. Show the sample space & n(s)

zzz [600]

Answer:

The answers to your questions are given below.

Explanation:

The following data were obtained from the question:

Red (R) = 4

White (W) = 7

1. Determination of the sample space, S.

The box contains 4 red balls and 7 white balls. Therefore, the sample space (S) can be written as follow:

S = {R, R, R, R, W, W, W, W, W, W, W}

nS = 11

2. Determination of the probability of all results that appeared in the sample space.

From the question, we were told that the two balls was drawn with return. There, the probability of all results that appeared in the sample space can be given as follow:

i. Probability that the first draw is red and the second is also red.

P(R1) = nR/nS

Red (R) = 4

Space space (S) = 11

P(R1) = nR/nS

P(R1) = 4/11

P(R2) = nR/nS

P(R2) = 4/11

P(R1R2) = P(R1) x P(R2)

P(R1R2) = 4/11 x 4/11

P(R1R2) = 16/121

Therefore, the Probability that the first draw is red and the second is also red is 16/121.

ii. Probability that the first draw is red and the second is white.

Red (R) = 4

White (W) = 7

Space space (S) = 11

P(R) = nR/nS

P(R) = 4/11

P(W) = nW/nS

P(W) = 7/11

P(RW) = P(R) x P(W)

P(RW) = 4/11 x 7/11

P(RW) = 28/121

Therefore, the probability that the first draw is red and the second is white is 28/121.

iii. Probability that the first draw is white and the second is also white.

White (W) = 7

Space space (S) = 11

P(W1) = nW/nS

P(W1) = 7/11

P(W2) = nW/n/S

P(W2) = 7/11

P(W1W2) = P(W1) x P(W2)

P(W1W2) = 7/11 x 7/11

P(W1W2) = 49/121

Therefore, the probability that the first draw is white and the second is also white is 49/121.

iv. Probability that the first draw is white and the second is red.

Red (R) = 4

White (W) = 7

Space space (S) = 11

P(W) = nW/nS

P(W) = 7/11

P(R) = nR/nS

P(R) = 4/11

P(WR) = P(W) x P(R)

P(WR) = 7/11 x 4/11

P(WR) = 28/121

Therefore, the probability that the first draw is white and the second is red is 28/121.

7 0

3 years ago

The connection is made using a bolt and nut and two washers. If the allowable bearing stress of the washers on the boards is (sb

Yuki888 [10]

Answer:

P = 0.490 kip

Explanation:

given data

allowable bearing stress = 2 ksi

allowable tensile stress = 18 ksi

diameter = 0.31 in

outer diameter = 0.75 in

inner diameter (hole) = 0.50 in

solution

we find here cross section area of shank that is express as

Area = $\frac{\pi }{4} \times d^2$ ..................1

area = $\frac{\pi }{4} \times 0.31^2$

area = 0.0754 in²

and

now we get here allowable load in bolt will be

$\sigma = \frac{P}{A}$ ...................2

P = $\sigma \times A$

P = 18 × 10³ × 0.0754

P = 1357.2 = 1.357 kip

and

now find here area of washer is

Area = $\frac{\pi }{4} \times (d^2-d1^2)$ .......................3

put here value

Area = $\frac{\pi }{4} \times (0.75^2-0.5^2)$

area = 0.2454 in²

so now we get here allowable load of washer will be

$\sigma = \frac{P}{Area}$ .....................4

P = 2 × 10³ × 0.245

P = 490 = 0.490 kip

6 0

2 years ago

A shipment from Earth to Mars contains a 60 gallon [gal] tank filled with an ideal gas. The molecular weight of the ideal gas i

mylen [45]

The ideal gas equation can find the amount of gas lost is 7 mol

Given parameters

The initial and final pressures P1 = 3 atm and P2 = 2.2 atm

The temperature T = 20ºC

Container volume V = 60 gallon

To find

The moles of gas lost

The intentional system of measurements (SI) is a system that determines which are the fundamental units, this allows to carry out calculations and exchange measurements in a uniform way and without errors, let's reduce the magnitudes to the SI system

P₁ = 3 atm (1 10⁵ Pa / 1 atm) = 3 10⁵ Pa

P₂ = 2.2 atm (1 10⁵ / 1 atm) = 2.2 10⁵ Pa

PM = 15.9 g / mol (1 kg / 1000 g) = 15.9 10⁻⁻³ kg / mol

V = 60 gallon (1 m³ / 264.172 gal) = 0.2271 m³

T = 20 + 273.15 = 293.15 K

Ideal gases are gases that have no interactions between them, so they can be described by the equation

PV = n R T

Where P is the pressure, V the volume, n the number of moles, R the ideal gas constant (R = 8.314 $\frac{J}{mol \ K}$ ) and T the temperature.