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Engineering

2 answers:

dusya [7]2 years ago

8 0

Ok it depends how old it is

Rufina [12.5K]2 years ago

7 0

Explanation:

I mean honestly it depends like how old is it? is it one of the newer generations because a majority of apple products have airtags but their is also the lost my iPhone app so they can track where ever their iPad or iPhone is.

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A 4-pole, 3-phase induction motor operates from a supply whose frequency is 60 Hz. calculate: 1- the speed at which the magnetic

DiKsa [7]

Answer:

The answer is below

Explanation:

1) The synchronous speed of an induction motor is the speed of the magnetic field of the stator. It is given by:

$n_s=\frac{120f_s}{p}\\ Where\ p\ is \ the \ number\ of\ machine\ pole, f_s\ is\ the\ supply \ frequency\\and\ n_s\ is \ the \ synchronous\ speed(speed \ of\ stator\ magnetic \ field)\\Given: f_s=60\ Hz, p=4. Therefore\\\\n_s=\frac{120*60}{4}=1800\ rpm$

2) The speed of the rotor is the motor speed. The slip is given by:

$Slip=\frac{n_s-n_m}{n_s}. \\ n_m\ is\ the \ motor\ speed(rotor\ speed)\\Slip = 0.05, n_s= 1800\ rpm\\ \\0.05=\frac{1800-n_m}{1800}\\\\ 1800-n_m=90\\\\n_m=1800-90=1710\ rpm$

3) The frequency of the rotor is given as:

$f_r=slip*f_s\\f_r=0.04*60=2.4\ Hz$

4) At standstill, the speed of the motor is 0, therefore the slip is 1.

The frequency of the rotor is given as:

$f_r=slip*f_s\\f_r=1*60=60\ Hz$

6 0

4 years ago

Write a simple calculator program. Your program should ask for three things two whole numbers and an operator in the form of an

vekshin1

Answer:

The solution code is written in Java.

Scanner input = new Scanner(System.in);
System.out.print("Enter operator: ");
String operator = input.nextLine();
System.out.print("Enter first integer: ");
int num1 = input.nextInt();
System.out.print("Enter second integer: ");
int num2 = input.nextInt();
int result = 0;
switch(operator){
case "+":
result = num1 + num2;
break;
case "-":
result = num1 - num2;
break;
case "*":
result = num1 * num2;
break;
case "/":
result = num1 / num2;
break;
default:
System.out.println("Invalid operator");
}
System.out.println(result);

Explanation:

To ask for the user input for two whole numbers and an operator, we can use Java Scanner class object. Since the input operator is a string, we can use nextLine() method to get the operator string (Line 3). We use nextInt() method to get whole number input (Line 5 & 7).

Next we use the switch keyword and pass the operator into the switch structure to determine which case statement should be executed. For example, if the input operator is "*" the statement "result = num1 * num2; " will run and multiply num1 with num2.

3 0

4 years ago

What educational degree does an engineering technologists hold

Pavlova-9 [17]

Engineer technicians typically hold a two-year associates degree, while engineering technologists likewise hold a bachelors degree.

7 0

4 years ago

Compare and contrast the roles of agricultural and environmental scientists.

aleksandr82 [10.1K]

Answer:

HUHHHHHH BE SPECIFIC CHILE

Explanation: