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vagabundo [1.1K]
3 years ago
12

A piston-cylinder device contains helium gas. During a reversible, isothermal process, the entropy of the helium will _________

increase. During a reversible, adiabatic process, the entropy of the helium will ____________ increase. During an actual adiabatic process, the entropy of the helium will ________ increase.
Engineering
1 answer:
DiKsa [7]3 years ago
5 0

Answer:

During a reversible, adiabatic process, the entropy of the helium will NEVER increase.

During a reversible, isothermal process, the entropy of the helium will SOMETIMES increase

During an actual adiabatic process, the entropy of the helium will DEFINITELY increase

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A road has a crest curve, where the PVI station is a 71 35. The road transitions from a 2.1% grade to a -3.4% grade. The highest
sveticcg [70]

Answer:

Stat PVC = Stat(82+98.5)

Stat PVT = Stat(59+71.5)

Explanation

PVI = 71 + 35

Let G1 = Grade 1; G2 = Grade 2

G1 = +2.1% ; G2 = -3.4%

Highest point of curve at station = 74 + 10

General equation of a curve:

y = ax^{2} +bx+c\\dy/dx=2ax+b\\

At highest point of the curve dy/dx=o

2ax+b=0\\x=-b/2a\\x=G1L/(G2-G1)\\x=L/2 +(stat 74+10)-(stat 71+35)\\x=L/2 + 275

-G1L/(G2-G1) = (L/2 + 275)/100\\L = -2327 ft\\Station PVC = Stat(71+35)+(-2327/2)\\\\Stat PVC = 7135-1163.5\\Stat PVC = Stat(82+98.5)\\

Station PVT

Station PVT = Stat PVI + (L/2)\\Station PVT = Stat(71+35)+(-2327/2)\\Station PVT = 7135-1163.5\\Stat PVT = Stat(59+71.5)

3 0
3 years ago
The Double.parseDouble() method requires a String argument, but it fails if the String cannot be converted to a floating-point n
LuckyWell [14K]

Answer:

  1. import java.util.Scanner;
  2. public class TryToParseDouble {
  3.    public static void main(String[] args) {
  4.        Scanner input = new Scanner(System.in);
  5.        double num;
  6.        try{
  7.            System.out.print("Input a number: ");
  8.            num = Double.parseDouble(input.nextLine());
  9.        }catch(NumberFormatException e){
  10.            num = 0;
  11.            System.out.println("Invalid input! It should be a number in double type");
  12.        }
  13.        System.out.println(num);
  14.    }
  15. }

Explanation:

Firstly, create a Scanner object to get user input (Line 5).

Next, create a try block and prompt user to input a number and use Double.parseDouble() method to convert the input to double type in the block (Line 8-10).

Next, create a catch block to catch a NumberFormatException. In the Catch block, set the num to zero and then print out a message to inform user about the invalid input (Line 12-14).

Lastly, display the number (Line 16).

5 0
3 years ago
What is the definition of a duty cycle?
ira [324]

Answer:

D=\frac{PW}{T}*100

Explanation:

In electrical terms, is the ratio of time in which a load or circuit is ON compared to the time in which the load or circuit is OFF.

The duty cycle or power cycle, is expressed as a percentage of the activation time. For example, a 70% duty cycle is a signal that 70% of the time is activated and the other 30% disabled. Its equation can be expressed as:

D=\frac{PW}{T}*100

Where:

D=Duty\hspace{3}Cycle

PW=Pulse\hspace{3}Active\hspace{3}Time

T=Period\hspace{3}of\hspace{3}the\hspace{3}Signal

Here is a picture that will help you understand these concepts.

5 0
3 years ago
In this lab, your task is to configure the external vEthernet network adapter with the following IPv6 address: Prefix: 2620:14F0
OverLord2011 [107]

Here is the complete question

You work as the IT administrator for a small corporate network. You need to create a separate subnet to use for testing. The test subnet needs access to the rest of the network through a router, but it should not have any local access to production machines.

You have installed Windows Server 2016 on CorpRTR, which you plan to use to isolate the test segment from the rest of the network. You'll use traditional routing or NAT.

In this lab, your task is to add the necessary role and role services to meet the stated requirements. Do not add unnecessary role services.

Answer & Explanation:

Complete this lab as follows:

1.In the notification area, right-click the Network icon and select Open Network and Sharing Center.

2.On the left, select Change adapter settings.

3.Right-click the vEthernet (External)adapter and select Properties.

4.Select Internet Protocol Version 6 (TCP/IPv6).

5.Select Properties.

6.Select Use the following IPv6 address.

7.In the IPv6 address field, enter 2620:14F0:45EA:0001:192:168:0:10as the IPv6 address.

8.In the Subnet prefix length field, enter 64.

9.Click OK.

10.Click Close.

11.In the Search the web and Windows field, enter cmd.

12.Under Best match, right-click Command Prompt and select Run as Administrator.

13.At the command prompt, type ipconfig /all and press Enter to view the IPv6 address.

4 0
4 years ago
Hand tools and power tools should be cleaned and stored in the same manner. A) True B) False
Serhud [2]

Answer:

False

Explanation:

4 0
3 years ago
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