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Free_Kalibri [48]
3 years ago
6

Select the correct answer.

Engineering
1 answer:
cricket20 [7]3 years ago
5 0

Answer:

A.

The power generated by a wind farm is not constant because of irregular wind patterns.

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I need solution for this question please<br>Select the right answer ​
Ostrovityanka [42]

Explanation:

the 7th one answer is beacause mercury is bad at sharing electrons

the 8th one's answer is Rhodium

3 0
3 years ago
Read 2 more answers
Air is compressed steadily from 100kPa and 20oC to 1MPa by an adiabatic compressor. If the mass flow rate of the air is 1kg/s an
igomit [66]

Answer:

(a). 575 kJ/kg.

(b). 290kw.

Explanation:

We have the following set of information or parameters from the question above;

Pressure(1) = 100kPa, Pressure (2) = 1MPa, temperature(1) = b1= 12°C = 285K = 285kJ/kg, efficiency = 80% and the mass flow rate of the air = 1kg/s.

At a temperature of 12°C, we have the value from steam table; gx= 1.2, thus gx22 = 1.2 × (1000/100) = 12.

We have that the value for b12 = 517.

Therefore, the value for h2a can be calculated as;

80/100 = (517 - 285)/ (tp at exist) - 285.

0.8 = 232/ (tp at exist) - 285.

232 = 0.8 × (tp at exist) - 285).

232 = 0.8 (tp at exist) - 228 .

(tp at exist) = 575.

Therefore, the temperature 575 kJ/kg.

Thus, the required power input of the compressor = 1kg/s × ( 575 - 285) = 290kw.

6 0
3 years ago
A light pressure vessel is made of 2024-T3 aluminum alloy tubing with suitable end closures. This cylinder has a 90mm OD, a 1.65
Andru [333]

Given:

Outer Diameter, OD = 90 mm

thickness, t = 0.1656 mm

Poisson's ratio, \mu = 0.334

Strength = 320 MPa

Pressure, P =3.5 MPa

Formula Used:

1).  Axial Stress_{max} = P[\frac{r_{o}^{2} + r_{i}^{2}}{r_{o}^{2} - r_{i}^{2}}]

2). factor of safety, m = \frac{strength}{stress_{max}}

Explanation:

Now, for Inner Diameter of cylinder, ID = OD - 2t

ID = 90 - 2(1.65) = 86.7 mm

Outer radius,  r_{o} = 45mm

Inner radius,  r_{i} = 43.35 mm

Now by using the given formula (1)

  Axial Stress_{max} = 3.5[\frac{45^{2} + 43.35^{2}}{45^{2} - 43.35^{2}}]

  Axial Stress_{max} = 3.5\times 26.78 =93.74 MPa

Now, Using formula (2)

factor of safety, m = \frac{320}{93.74} = 3.414

7 0
3 years ago
Write a program in C++ that can be used by a small theater to sell tickets for performances.The theater’s auditorium has 15 rows
Natalka [10]

Answer:

See explaination

Explanation:

#include<iostream>

using namespace std;

char seating[15][20];

float row_price[15];

//This function will display the seating chart

void display()

{

cout<<"-------------------------- Seating Chart----------------------------\n";

cout<<"Seats: ";

for(int i=0;i<20;i++)

cout<<i<<" ";

cout<<"\n";

for(int i=0;i<15;i++)

{

if(i<10)

cout<<"Row "<<i<<" ";

else

cout<<"Row "<<i<<" ";

for(int j=0;j<20;j++)

{

if(j<10)

cout<<seating[i][j]<<" ";

else

cout<<seating[i][j]<<" ";

}

cout<<"\n";

}

}

//This function will prompt to the user to enter row fares

void row_price_details()

{

cout<<"Enter row wise fares:\n";

for(int i=0;i<15;i++)

cin>>row_price[i];

}

//Main function

int main()

{

char choice;

int i,j,row,seat;

float revenue=0;

//step-1 initializing seating chart with * (available)

for(i=0;i<15;i++)

{

for(j=0;j<20;j++)

{

seating[i][j]='*';

}

}

//displaying seating chart by calling display() function

display();

//prompt the user to enter row fares by calling row_price_details() function

row_price_details();

//Booking seats until user say n or N

do{

cout<<"Enter Row number and Seat number:\n";

cin>>row>>seat;//getting seat and row numbers

//validating enter seat number or row number or with in boundry or not

//if not displays Error message

if(row<15||seat<<20)

{

//checking entered position is available or not

//if not displays sorry message

if(seating[row][seat]=='*')

{

revenue=revenue+row_price[row];//calculating revenue

seating[row][seat]='#';//making seat unavailable

cout<<"Thankyou for Booking\n";

}

//sorry message

else

{

cout<<"The position yor entered is not available\n See seating chart to know available seats\n";

display();

}

}

//Error message

else

{

cout<<"Invalid seat number or row number....\n";

}

cout<<"Do you want to buy another ticket?\nif yes enter Y or y else N or n\n";

cin>>choice;

}while(choice=='Y'||choice=='y');

//displaying summery of the booking

//seating chart and revenue

cout<<"After booking the seating chart:\n";

display();

cout<<"Total Revenue:\n"<<revenue;

}

7 0
3 years ago
ceramics must be heated in order to harden the clay and make it durable. the equipment used to heat the clay
SIZIF [17.4K]

Ceramics must be heated in order to harden the clay and make it durable. The tool used to heat the clay is called a Kiln.

<h3>What happens when ceramic is heated?</h3>

Cristobalite is a silica polymorph that is used in ceramics. Quartz particles in porcelain can change into cristobalite during burning. This has effects on the fired matrix's thermal expansion. When there is a high level of vitrification or a shape is unstable during the firing of ceramic ware, warping occurs.

Ceramic items are porous, brittle, and rigid. They are thus employed in the production of glass, ceramics, cement, and bricks. Additionally, ceramics are employed extensively in gas turbine engines. Artificial bones and dental implants are both made of bio-ceramics.

Any of the several tough, fragile, heat- and corrosion-resistant materials created by sculpting and then heating an inorganic, nonmetallic material like clay to a high temperature are known as ceramics.

In order to solidify the clay and make ceramics durable, heat must be applied. A kiln is the name of the device used to heat clay.

To learn more about ceramics refer to:

brainly.com/question/26247382

#SPJ4

5 0
2 years ago
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