1. Several forces act on an object at rest. It is known that the sum of the forces acting on the object is zero. Which statement is necessarily true?
A) The object will remain stationary.
B) The object's center of mass may move in such a way that the object will roll without slipping.
C) The object's center of mass will not move, but the object may begin to rotate.
D) The object's center of mass may accelerate and the object may begin to rotate.
E) The object's center of mass may accelerate, but the object will remain in the same orientation.

2. A heavy boy and a lightweight girl are balanced on a massless seesaw. If they both move forward so that they are one-half their original distance from the pivot point, what will happen to the seesaw?
A) It is impossible to say without knowing the masses.
B) It is impossible to say without knowing the distances.
C) The side the boy is sitting on will tilt downward.
D) Nothing, the seesaw will still be balanced.
E) The side the girl is sitting on will tilt downward.

3. A cone balanced on its small end is in
A) stable equilibrium.
B) unstable equilibrium.
C) neutral equilibrium.
D) positive equilibrium.
E) negative equilibrium.

4. A sphere hanging freely from a cord is in
A) stable equilibrium.
B) unstable equilibrium.
C) neutral equilibrium.
D) positive equilibrium.
E) negative equilibrium.

5. The region from the origin to the elastic limit on an applied force versus elongation graph for a typical metal under tension is referred to as the
A) elastic region.
B) proportional region.
C) plastic region.
D) ultimate strength region.
E) breaking region.

6. The maximum elongation of a typical metal is reached at the
A) proportional limit.
B) elastic limit.
C) inelastic limit.
D) breaking point.
E) ultimate strength.

7. Strain is
A) the ratio of the change in length to the original length.
B) the stress per unit area.
C) the same as force.
D) the applied force per cross-sectional area.
E) the ratio of stress to elastic modulus.

An LED is connected to PD3 and a Button is connected to PD0. Write a C program that will wait for the button to be pressed and then released (make sure you debounce the press and release). Each time the button is pressed, the LED blinks a number of times corresponding to how many times the button has been pressed and released. For example, when the button is pressed and released for the first time, the LED will blink once; and when the button is pressed and released the second time, the LED will blink twice, etc. The button will be pressed once and release once each time. The LED shows a count (accumulated number of times Button was pressed).

Use a sentinel while loop that repeatedly prompts the user to enter a number, once -1 is entered, stop prompting for numbers and display the maximum number entered by the user.

I am struggling to have my program print the math function. Here is what I have so far:

import java.util.*;
public class MaxSentinel
{
public static void main(String[] args)
{
  
Scanner input = new Scanner(System.in);
System.out.println("Please enter a value. Press -1 to stop prompt.");
int number = 0;
do
{
System.out.println("Enter a value.");
number = input.nextInt();
}
while(number != -1);
  
  
}
}

he article "Chances Are You Know Someone With a Tattoo, and He's Not a Sailor" (Associated Press, June 11, 2006) reported the following approximate probabilities based on a survey of 1000 adults ages 18 to 50:

P(age 18 to 29) = 0.50

P(tattoo) = 0.24

P(tattoo and age 18 to 29) = 0.18

Construct a contingency table and use your table to answer the following question.

What is the probability that a randomly selected 30 to 50 year old has a tattoo?

Write your answer as a percent rounded to the nearest tenth. Be sure to interpret your answer in a complete sentence.

I ranked the steam engine as one of the half dozen most important inventions in history – explaining how, even if obsolete nowadays, it was the first engine able to generate power, a technology that revolutionized our ability to do something we could never do before. Choose five other inventions you think would similarly round out the top half dozen, and make a good case as to how each merits the important position you gave it in the progress of science, technology, or society. Think historically and comprehensively.

inventions( Printing press, light bulb, telegraph, the wheel, microscope)

At a Master's level of education in 200 words or less.

To Err Is Human: Building a Safer Health System and Free from Harm, Accelerating Patient Safety Improvement Fifteen Years after To Err Is Human, what key findings persist despite efforts to improve the quality of healthcare and prevent medical errors?

References below

Institute of Medicine. (2000). To err is human: Building a safer health system. The National Academies Press.

National Patient Safety Foundation. (2015). Free from harm: Accelerating patient safety improvement fifteen years after to err is human. National Patient Safety Foundation.

You represent a Canadian toy company that is negotiating to buy miniature truck wheels from a manufacturer in Osaka, Japan. In your first meeting, you explain that your company expects to control the design of the wheels as well as the materials that are used to make them. The manufacturer’s representative looks down and says softly, “Perhaps that will be difficult.” You press for agreement, and to emphasize your willingness to buy, you show the prepared contract you have brought with you. However, the manufacturer seems increasingly vague and uninterested.

C++

The txt file is not showing up in my output

#include <iostream>
#include <fstream>
#include <string>
#include "Classroom.h"


using namespace std;

Classroom myLib;

void loadDataset(string fileName) 
{
        ifstream myFile;
        myFile.open(fileName.c_str());
}


void continueMessage(string message) {
        cout << message << endl;
        cout << "Press Enter to continue.." << endl; cin.get();
}

int main() 
{       
        
        string fileName = "dataset.txt";
        loadDataset(fileName);

        myLib.print();
        continueMessage;

        string ID = "Janet Newman";
        myLib.removeStudent (ID);
        continueMessage("Janet Newman has been removed.");
        //---------------------------------------------------------------------------
        myLib.print();
        continueMessage("All students are listed!");

        return 0;
}

A flat, solid cylindrical grinding wheel with a diameter of 24.2 cm is spinning at 3000 rpm when its power is suddenly turned off. A workman continues to press his tool bit toward the wheel's center at the wheel's circumference so as to continue to grind as the wheel coasts to a stop.

If the wheel has a moment of inertia of 4.99 kg⋅m2 , the necessary torque (116 m*N ) must be exerted by the workman to bring it to rest in 13.5 s .

If the coefficient of kinetic friction between the tool bit and the wheel surface is 0.800, how hard must the workman push on the bit?(in newtons)