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irina1246 [14]
3 years ago
6

Two samples of dirt are collected from a suspect's tread in his shoe and a crime scene. The forensic investigator does a gross e

xamination of color, texture, shapes, and foreign objects. She notes very similar characteristics. What must she also do to further prove these samples are from the same soil?
A) place in acid to see if it dissolves
B) do the same examination under a microscope
C) combine the samples to see if they look the same
D) pour the same in the soil of where you think it came from and see if it matches
Computers and Technology
2 answers:
Naddik [55]3 years ago
8 0

Answer:

Option B) do the same examination under a microscope

Explanation:

In order to determine the exactness of the sample, the examination over a microscope has to be done.

The microscope provides detailed information about the morphology of the particles. In other words, the microscope examines the minute details of the soil particles. These include the particle size, orientation, foreign substance if any, as well as any discrepancies in the two samples :the shoe and soil.

In the same lab, an examination of the shoe is also conducted. There must be the same particles on the soil and shoes. Thus, a microscope is able  to do that.

frozen [14]3 years ago
4 0
Do the same examination under a microscope
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The Speed of Sound (Java Project. Please make it easy to understand. I'm a beginner at this. I believe we are supposed to use a
Ilya [14]

Answer:

The program of this question can be given as:

Program:

//import pacakge for user input.

import java.util.Scanner;

//define class  

public class SpeedofSound              

{

  public static void main(String a[]) //define main function

  {  

      //define variable.

      String medium;                            

      double distance,time=0;

      //creating Scanner class object for input from user.

      Scanner s=new Scanner(System.in);  

      //print message.

      System.out.printf("Enter medium(air,water or steel) : ");

      medium=s.nextLine();  //taking input.

      //print message.

      System.out.printf("Enter the distance that the sound will travel : ");

      distance=s.nextDouble(); //taking input.

      switch(medium) //checking condtion between range.

      {

          case "air":

                  time=distance/1100;         //apply formula

                  break;

          case "water":

                  time=distance/4900;            //apply formula

                  break;

          case "steel":

                  time=distance/16400;            //apply formula

                  break;

          default:

                  System.out.printf("Sorry, you must enter air,water or steel"); //error for invalid input of medium

                  System.exit(0);

      }

      System.out.printf("It take "+time+" seconds"); //print final answer.

  }

}

Output:

Enter medium(air,water or steel) : air

Enter the distance that the sound will travel : 200

It take 0.18181818181818182 seconds

Explanation:

In this program first, we import packages for user input. Then we declare the class in the class we declare all the variables and then we create the scanner class object. It is used for taking input from the user. Then we use the switch statement It is used for condition. It works between the ranges. In the switch statement, we apply all the formula that is given in the question. and at the last, we print the output using printf function in java.

6 0
3 years ago
You want some points? whoever answers first gets 48 points. no cap. better be quick.
LekaFEV [45]

Answer:

4

Explanation:

5 0
3 years ago
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Given parameters b and h which stand for the base and the height of an isosceles triangle (i.e., a triangle that has two equal s
schepotkina [342]

Answer:

The area of the triangle is calculated as thus:

Area = 0.5 * b * h

To calculate the perimeter of the triangle, the measurement of the slant height has to be derived;

Let s represent the slant height;

Dividing the triangle into 2 gives a right angled triangle;

The slant height, s is calculated using Pythagoras theorem as thus

s = \sqrt{b^2 + h^2}

The perimeter of the triangle is then calculated as thus;

Perimeter = s + s + b

Perimeter = \sqrt{b^2 + h^2} + \sqrt{b^2 + h^2} +b

Perimeter = 2\sqrt{b^2 + h^2} + b

For the volume of the cone,

when the triangle is spin, the base of the triangle forms the diameter of the cone;

Volume = \frac{1}{3} \pi * r^2 * h

Where r = \frac{1}{2} * diameter

So, r = \frac{1}{2}b

So, Volume = \frac{1}{3} \pi * (\frac{b}{2})^2 * h

Base on the above illustrations, the program is as follows;

#include<iostream>

#include<cmath>

using namespace std;

void CalcArea(double b, double h)

{

//Calculate Area

double Area = 0.5 * b * h;

//Print Area

cout<<"Area = "<<Area<<endl;

}

void CalcPerimeter(double b, double h)

{

//Calculate Perimeter

double Perimeter = 2 * sqrt(pow(h,2)+pow((0.5 * b),2)) + b;

//Print Perimeter

cout<<"Perimeter = "<<Perimeter<<endl;

}

void CalcVolume(double b, double h)

{

//Calculate Volume

double Volume = (1.0/3.0) * (22.0/7.0) * pow((0.5 * b),2) * h;

//Print Volume

cout<<"Volume = "<<Volume<<endl;

}

int main()

{

double b, h;

//Prompt User for input

cout<<"Base: ";

cin>>b;

cout<<"Height: ";

cin>>h;

//Call CalcVolume function

CalcVolume(b,h);

//Call CalcArea function

CalcArea(b,h);

//Call CalcPerimeter function

CalcPerimeter(b,h);

 

return 0;

}

3 0
3 years ago
You want a class to have access to members ofanother class in the same package. Which is themost restrictive access that accompl
sweet-ann [11.9K]

Answer:

default access

Explanation:

Classes, methods, variables(identifiers*) declared without any access modifier are considered as default and these can be accesed in others clases of same  package.

Identifiers are the name of classes, methods, variables, arrays, enums, etc.

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3 years ago
Write a letter to the editor of a national newspaper complaining about the bad roads in your town or city, and giving at least t
maw [93]

Answer:

Dear editor.

I am writing this letter to alert you to the serious problems we are facing on the main highways of our city, where traffic is completely neglected and the number of accidents has grown at an alarming rate.

Our highways have holes in the roads, lack of signage, traffic lights with malfunction and lack of traffic guards. All of this has left the traffic in the city a real chaos and has caused a great risk to the lives of drivers and pedestrians.

We went to the city hall to ask for a solution to this problem, but we didn't get an answer. For this reason, I come, humbly, to ask you to address this problem in your newspaper so that the attention of the authorities is brought to your attention.

Thank you in advance for your time and consideration.

Regards,

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7 0
3 years ago
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