Arrange the following 0.10 M
solutions in order of increasing acidity: (i) NH4NO3, (ii) NaNO3, (iii) CH3COONH4, (iv) NaF, (v) CH3COONa.
In: Chemistry
Green v. County school board—brief this case into four sections
In: Economics
The figure below gives the speed v versus time t for a 0.490 kg object of radius 6.50 cm that rolls smoothly down a 30
In: Physics
When can and can't we use the equation the equation ΔX=v^2sin(2θ)/g to find the horizontal displacement in projectile motion problems?
In: Physics
2) What are 3 major causes of death in middle adulthood? Is there current research that shows any of these trends increasing in fatality v. decreasing in numbers?
In: Psychology
A 8.0 V potential difference is applied between the ends of a 0.80 mm -diameter, 25 cm -long nichrome wire. What is the current in the wire?
In: Physics
I need to make changes to code following the steps below. The code that needs to be modified is below the steps. Thank you.
1. Refactor Base Weapon class:
a. Remove the Weapon abstract class and create a new Interface class named WeaponInterface.
b. Add a public method fireWeapon() that returns void and takes no arguments.
c. Add a public method fireWeapon() that returns void and takes a power argument as an integer type.
d. Add a public method activate() that returns void and takes an argument as an boolean type.
2. Refactor the specialization Weapon Classes:
a. Refactor the Bomb class so that it implements the WeaponInterface class.
b. Refactor the Gun class so that that it implements the WeaponInterface class.
3. Refactor the Game Class:
a. Remove all existing game logic in main().
b. Create a private helper method fireWeapon() that takes a WeaponInterface as an argument as a weapon. For the passed in weapon activate the weapon then fire the weapon.
c. Create an array of type WeaponInterface that can hold 2 weapons.
d. Initialize the first array element with a Bomb.
e. Initialize the second array element with a Gun.
f. Loop over the weapons array and call displayArea() for each weapon.
------
// Weapon.java
public abstract class Weapon {
public void fireWeapon(int power)
{
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
System.out.println("Power
:"+power);
}
public abstract void activate(boolean enable);
}
______________________
// Bomb.java
public class Bomb extends Weapon {
@Override
public void fireWeapon(int power)
{
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
System.out.println("Power
:"+power);
}
public void fireWeapon()
{
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
super.fireWeapon(67);
}
@Override
public void activate(boolean enable) {
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
System.out.println("Enable
:"+enable);
}
}
_____________________________
// Gun.java
public class Gun extends Weapon {
@Override
public void fireWeapon(int power)
{
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
System.out.println("Power
:"+power);
}
public void fireWeapon()
{
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
super.fireWeapon(98);
}
@Override
public void activate(boolean enable) {
System.out.println("Class Name
:"+this.getClass().getSimpleName());
System.out.println("Mathod Name
:"+new Throwable().getStackTrace()[0].getMethodName());
System.out.println("Enable
:"+enable);
}
}
_____________________________
// Game.java
public class Game {
public static void main(String args[]) {
Bomb b = new Bomb();
Gun g = new Gun();
b.fireWeapon(45);
g.fireWeapon(60);
}
}
In: Computer Science

Anita is running to the right with a speed of \(6.0 \mathrm{~m} / \mathrm{s}\), as shown in the figure. Balls 1 and 2 are thrown toward her by her friends (standing still on the ground). As measured by Anita, both balls are approaching her at a speed of \(11 \mathrm{~m} / \mathrm{s}\).
You may assume all the motions are completely horizontal.
a) According to her friends, what is the magnitude and direction of the velocity of ball \(1\left(\vec{v}_{1}\right) ?\)
b) According to her friends, what is the magnitude and direciton of the velocity of ball \(2\left(\vec{v}_{2}\right)\) ?
In: Physics
Which of the following statements is/are FALSE? I YTM is the discount rate that sets the present value of the promised bond payments equal to the current market price of the bond. II To calculate the expected return, one should discount promised payments. III To calculate the YTM, one should discount expected payments. IV If there is a risk of default, then the bond’s expected return is greater than the YTM. V The realized return is always equal to the YTM. A. I, II B. II, IV C. II, III, IV, V D. II, III E. II, III, IV
In: Finance
A professor tests whether the loudness of noise during an exam (low, medium, and high) is independent of exam grades (pass, fail). The following table shows the observed frequencies for this test.
| Noise Level | |||||
|---|---|---|---|---|---|
| Low | Medium | High | |||
| Exam | Pass | 20 | 18 | 8 | 46 |
| Fail | 8 | 6 | 10 | 24 | |
| 28 | 24 | 18 | N = 70 | ||
(a) Conduct a chi-square test for independence at a 0.05 level
of significance. (Round your answer to two decimal places.)
=
(b) Compute effect size using Cramer's V. (Round your
answer to two decimal places.)
V =
In: Statistics and Probability