Find [H+] in 0.40 M NH₄NO₃ at 25 degrees Celsius given that K_b = 1.8 x 10^-5 for NH₃ (aq).

Discuss with the aid of diagrams any three (3) particle size reduction equipment?

Two students take the same test which consists of 5 questions, each one with 5 answers, each one with only 1 correct answer. If the students respond the test randomly

i) What is the probability that both of the students get the same number of correct answers?

ii) Find the probability that both tests are the same (assume that each test is independent from each other)

iii) What is the expected number of correct answers for each student?

iv) What is the probability that both students pass the test if they have to get at least 3 correct answers to pass it?

An object’s position is described by the equation x = At – Bt 4 + C. What are the dimensions of (a) A, (b) B, and (c) C? (d) Find the time derivative of position, dx/dt. (e) What are the dimensions of the time derivative?

SpeechAnalyst

The purpose of this assignment is to practice using strings and C-strings. Your task is to create a class that counts words (by looking for spaces) and sentences (by looking for periods). The data will either come in dribs-and-drabs. Use the infamous operator "<<" to output the data seen so far. Because std::string is a class, I'd recommend you use it to store the text information that has been entered through calls to addData and addStringData.

HINT: You may add additional methods to the SpeechAnalyst class as long as you implement those defined in the original class definition.

Write a java program that takes 5 students final test scores from console when prompting. Store these scores in an array. Iterate thru the array of student scores to find –

• Highest score entered

• Lowest score entered

• Average of all the 5 scores

• Total of all the scores

Print these values to the console (screen).

A study of depression and exercise was conducted. A total of 5 groups were used: each group differs by the extent to which group members exercise. A depression rating (scale: 1-100, a continuous variable) was given to all 1410 participants in the sample. An incompleted ANOVA table is provided below. What is the obtained F (i.e., value in Cell [8])?

How/why does the chemical species F- (fluoride) at concentrations 3.22 ppm cause fish death? Explain your answer in a typed paragraph.

Write a program that prompts the user to enter a date in the format mm/dd/yyyy
where mm is the month , dd is the day and yyyy is a 4 digit year
Check if the date is valid by seeing month is between 1 and 12, day is between 1 to 31 and year is between 1800 to 3000. Also check that if month is 2, day is between 1 to 29
If the date is valid then display the date back in following format dd month year. Use of SimpleDateFormat Java Class is NOT allowed to do this assignment. You need to use String functions from Chapter 4 to do this assignment.

Following is a sample run:
Enter a date in the format mm/dd/yyyy:
02/23/1999
23 Feb 1999

Following is another sample run:

Enter a date in the format mm/dd/yyyy:
02021999
Input String Length should be 10

Following is another sample run:

Enter a date in the format mm/dd/yyyy:
02-23-2000
Invalid Date Format

Following is another sample run:

Enter a date in the format mm/dd/yyyy:
23/02/2000
Invalid Date

A child on a sled is travelling a total distance of 93 m down a dirt hill with an angle of 30 degrees from the horizontal from the top of the hill. The mass of the child and sled is 65 kg. The initial velocity is zero and the final velocity is 5.0 m/s. (a) What is the time it takes to travel down the hill? (b) What is the acceleration down the hill? (c) What is the force of friction? (d) What is the coefficient of kinetic friction?

1)

The provided file has syntax and/or logical errors. Determine the problem(s) and fix the program.

Grading

When you have completed your program, click the Submit button to record your score.

// Uses DisplayWebAddress method three times
using static System.Console;
class DebugSeven1
{
static void Main()
{
DisplayWebAddress;
Writeline("Shop at Shopper's World");
DisplayWebAddress;
WriteLine("The best bargains from around the world");
DisplayWebAddres;
}
public void DisplayWebAddress()
{
WriteLine("------------------------------");
WriteLine("Visit us on the web at:");
WriteLine("www.shoppersworldbargains.com");
WriteLine("******************************");
}
}

2)

The provided file has syntax and/or logical errors. Determine the problem(s) and fix the program.

Grading

When you have completed your program, click the Submit button to record your score.

// Address an envelope using names and addresses
// stored in two parallel arrays
using static System.Console;
class DebugSeven2
{
static void Main()
{
string[] addressees = {"Ms. Mary Mack", "Mr. Tom Thumb", "Dr. Seuss"};
string[] addresses = {"123 Main", "456 Elm" "87 Maple"};
for(int x = 0; x < addressees.Length; ++x)
AddressEnvelope(addresses[x], addresses[x]);
}
private static void AddressEnvelope(string person, string street)
{
WriteLine("To : {0}", person);
WriteLine(" {1}", street);
for(x = 0; x < 30; ++x)
Write("-");
WriteLine();
}
}

Two stationary positive point charges, charge 1 of magnitude 3.05nC and charge 2 of magnitude 1.75nC , are separated by a distance of 44.0cm . An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges.

What is the speed vfinal of the electron when it is 10.0cm from charge 1?

Express your answer in meters per second.

An engine operates with four essential variables controlling its operation. For the engine to be operating properly, at least two of its control variables must be present at the same time. However, when the machine is not operating correctly, we wish to have some signal to alert us to the problem. Design a circuit to implement the state when the alarm signal is present