Not much of a question :/ dont answer

Select the correct answer.

babunello [35]

Answer:

The information he needs next is;

B. Volume of paint needed per unit area

Explanation:

The operation Andy wants to perform = To apply paint on the walls of the house

The information Andy knows = The area of all walls in the house

The total volume of paint needed = The total area of the walls × The volume of paint needed for each unit area

Therefore, the information required is the volume of paint needed per unit area.

3 0

3 years ago

What does a block tester do?

tatyana61 [14]

Answer:

Block design test. A block design test is a subtest on many IQ test batteries used as part of assessment of human intelligence. It is thought to tap spatial visualization ability and motor skill.

Explanation:

6 0

3 years ago

A weight-lifting athlete raises a mass of 160 kg through a vertical distance of 1.4 m. What force did

Over [174]

Answer:

1568N

2195.2J

Explanation:

Given parameters:

Mass of the weight = 160kg

Distance = 1.4m

Unknown:

Force applied to lift the weight = ?

Energy expended = ?

Solution:

The force applied in moving a body with a given mass through a distance is the weight;

Force applied = mg

Where m is the mass

g is the acceleration due to gravity

i. Applied force = 160 x 9.8 = 1568N

ii. The energy used to lift the weight is given as;

Energy = mgh

h is the vertical distance

Energy = 1568 x 1.4 = 2195.2J

8 0

3 years ago

Write a program that dynamically allocates an array large enough to hold a user-defined number of test scores. Once all the scor

Readme [11.4K]

Answer:

#include <iostream>

#include <iomanip>

using namespace std;

//Function prototypes

void arrSelectSort(double *, int);

double arrAvgScore(double *, int);

int main()

{

//Variables definition

double *TestScores,

total = 0.0,

average;

int numTest,

count;

//Enter the number of test scores you want to get to their average in ascending order

cout << "How many test scores do you wish to enter?";

cin >> numTest;

//Dynamically allocate an array large enough to hold that many scores

TestScores = new double[numTest];

//Get the test scores

cout << "Enter the test scores below.\n";

for (count = 0; count < numTest; count++)

{

//Display score

cout << "Test Score " << (count + 1) << ": ";

cin >> TestScores[count];

}

// Input validation. Only numbers between 0-100

while (numTest<0)

{

cout << "You must enter a scores that non-negative" << endl;

cout << "Please enter a non-negative interger between 0 and 100: ";

cin >> TestScores[count];

}

//Calculate the total test scores

for (count = 0; count < numTest; count++)

{

total += TestScores[count];

}

average = total / numTest;

//Dsiplay the results

cout << fixed << showpoint << setprecision(2);

cout << "The average of all the test score is " << average << endl;

//Free dynamically allocated memory

delete [] TestScores;

TestScores = 0; //make TestScores point to null

//Display the Test Scores in ascending order

cout << "The test scores, sorted in ascending order, are: \n";

system ("pause");

return 0;

}

//Ascending order selection sort

void arrSelectSort(double *arr, int size)

{

int startScan;

double minIndex;

double minElem;

for(startScan = 0; startScan < (size - 1); startScan++)

{

minIndex = startScan;

minElem = arr[startScan];

}

for(int index = startScan + 1; index < size; index++)

{

if (arr[index] < minElem)

{

minElem = arr[index];

minIndex = index;

}

void arrAvgScore (double *arr[], int size)

{

double total = 0;

int numTest;

for (int count = 0; count < numTest; count++)

{

total += numTest[count];

average = total / numTest;

}

6 0

4 years ago

Steam enters an adiabatic turbine at 7 MPa, 600°C, and 80 m/s and leaves at 50 kPa, 150°C, and 140 m/s. If the power output of t

katrin2010 [14]

Answer:

mass flow=6.84kg/s

efficiency=73.5%

Explanation:

Hi!

To solve this problem follow the steps below, the procedure is attached in an image

1. Draw the complete outline of the problem.

2.Through laboratory tests, thermodynamic tables were developed, these allow to know all the thermodynamic properties of a substance (entropy, enthalpy, pressure, specific volume, internal energy etc ..)

through prior knowledge of two other properties such as pressure and temperature.

use thermodynamic tables to determine the following thermodynamic properties:

a. enthalpy at the turbine inlet

b. entropy at the turbine entrance

c. ideal enthalpy at the turbine outlet

d. real enthalpy at the turbine outlet

3. use the turbine efficiency equation and use the enthalpies found in step 2

4.

uses the first law of thermodynamics that states that the energy that enters a system is the same that must come out, in this way we find the mass flow

6 0

3 years ago