### [Solved] A ball with a mass of m 0.75 kg is attached to a spring with a spring constant of k 2000 N/m and swung around in a vertical circle

Problem 3

A ball with a mass of m 0.75 kg is attached to a spring with a spring constant of k 2000 N/m and swung around in a vertical circle. When the spring is unstretched it has a length Io= 5 cm. When the ball is at the bottom of the circle, the spring is stretched to a length of 1 1 Find: The speed of the ball at the bottom of the circle. k- 2000 N/m 1-10 cm Cim m 0.75 kg

**Expert Answer**

Answer to

### [Solved] Write a program children.c, and let the parent process produce two child processes

Write a program children.c, and let the parent process produce two child processes. One prints out “I am child one, my pid i ” PID, and the other prints out “I am child two, my pid is: “PID. Guarantee that the parent terminates after the children terminate (Note, you need to wait for two child processes here). Use the getpid() function to retrieve the PID

**Expert Answer**

**Code:**

#include <stdio.h>

int main() {

int fork1 = fork();

if (fork1 < 0) {

### [Solved] The jet velocity in a Pelton turbine is 65 m/sec. The peripheral velocity of the runner is 25 m/sec.

The jet velocity in a Pelton turbine is 65 m/sec. The peripheral velocity of the runner is 25 m/sec. the jet is deflected by 160° by the bucket. Determine the power developed and hydraulic efficiency of the turbine for a flow rate of 0.9 m/sec, the blade friction coefficient is 0.9 and what the exit loss of power.

**Expert Answer**

Answer to The jet velocity in a Pelton turbine is 65 m/sec. The peripheral velocity of the runner is 25 m/sec…..

### [Solved] Methods/functions Write a method that prints “Methods are my friend!”

**Methods/functions **

- Write a method that prints “Methods are my friend!”
- Write a method that takes in a number as a parameter and, based on that number, prints out “Methods are my friend” that number of times.
- Write a method that takes in a letter and returns whether or not that letter is a vowel.
- Write a method that takes in a number that represents a high school GPA and determines if that value is greater than 3.0
- Write a method that takes in the age of a person and prints out (not returns) whether they are over 65 years of age.
- Write a method that takes in the age of a person and returns the number of “Dog years” they are. For this, the persons age will be divided by 7.

**Expert Answer**

**i) Write a method that prints “Methods are my friend!”**

**CODE:**

public class first {//the method.....

### [Solved] Let L(t) be the length of a certain fish at time t. Assume that this fish griwa according to the von Bertalanffy equation

Let L(t) be the length of a certain fish at time t. Assume that this fish griwa according to the von Bertalanffy equation dL(t)/dt=k {A-L(t)}, where k and A are positive parameteres. A study shows that the asymptotic length of fish is equal to 300 inches and that it takes this fish 20 months to each half its asmptotic length. Let L(0)-1 . a. Determine the value of k and A by showing the equation. b. how long will it take until the fish reaches 50% of its asymptotic length ?

**Expert Answer**

Answer to Let L(t) be the length of a certain fish at time t. Assume that this fish griwa according to the von Bertalanffy equation….

### [Solved] Replace the following Matlab matrix assignment statements in vectorized forms by equivalent FOR (4 points each)

Replace the following Matlab matrix assignment statements in vectorized forms by equivalent FOR (4 points each) and WHILE (6+6 = 12 points each) loops. Develop two versions of WHILE loop, one with an infinite loop and a BREAK statement, the other without. a. a = [1 : 7 : 91] b. c = a(2 : 3 : 9) c. b = a(10 : -2: 2) d. d(1 : 2 : 10) = a(1:5) e. g(1:3, 1:4) = [11 : 14; 21 : 24; 31 : 34]

**Expert Answer**

Answer to Replace the following Matlab matrix assignment statements in vectorized forms by equivalent FOR (4 points each)…

### [Solved] Lab 3 exercise-Demonstrate the impact mobile and cloud technology on business”.

Lab 3 exercise Demonstrate the impact mobile and cloud technology on business”. Write the steps and all the related screenshots. Enhance your ideas other information if needed Your demonstration should explain

• Mobile impact on the business. (In terms of communication, productivity improvement, marketing etc…..)

• Cloud Technology impact on the business. (In terms of convenience, cost saving, reliability, availability, security and privacy, etc…..)

**Expert Answer**

**mobile impact on business:**

Recent developments in the mobile communication technology have generated massive improvements in various business areas. Widespread adoption of **mobile technology** has also had significant effects on how businesses communicate, changing the way they deal with….

### [Solved] In Java Develop an email registration for the new email address the user can register by GUI by submitting the required data

In Java Develop an email registration for the new email address the user can register by GUI by submitting the required data like name ,email address…in the registration form .it needs to be checked whether the email already exists or not.if it exists then it should through an error just beside the email field , without submitting the form first .if the username is unique then the entry should be submitted to the server where it is inserted into the database .this task will involve java and RMI array or MySQL.

**Expert Answer**

**Java File Email_Registration.java**

*/

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet; ….