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marysya [2.9K]
3 years ago
13

The soft-tissue lining of oysters and clams creates pearls. Is a pearl a mineral?

Computers and Technology
2 answers:
Kisachek [45]3 years ago
3 0
<span>A pearl is not a mineral because it is created artificially. It is a gemstone, not a mineral because it is a composite of mineral Aragonite and a protein compound which is called conchiolin. Pearls are formed by organic and living organisms which is preserved to become a gemstone.</span>
8_murik_8 [283]3 years ago
3 0

No. Pearl is an organic substance

Pearl is an organic gemstone. It is a reaction to an irritant within a living pearl-producing mollusk. Mollusks have a soft body often protected by a shell such as calm, mussel, and oyster. Pearls are actually formed when the mollusk produce thousands of nacre. Pearls are commonly used in the jewellery industry.


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Answer: options A and B.

Option A, make the aid available for the audience to look at throughout the speech.

Option B, prepare to give your presentation without the aids, incase problem arises.

Explanation:

Presentation aids, sometimes also called sensory aids, are the resources beyond the speech itself that a speaker uses to enhance the message conveyed to the audience.

The type of presentation aids that speakers mostly make use of are visual aids; pictures, diagrams, charts and graphs, maps... Audible aids (musical excerpt, sound effects) and olfactory aids (fragrance samples or food samples) are also used.

* Presentation aids can be used throughout the speech but it should be used for essential points so as to to tire or bore the audience.

* Ensure presentation still works without the presentation aids in case of technical problems or if any problem arises at all.

* While explaining the aids, focus should be on the audience and not the presentation aids itself.

* Practice should be done with the presentation aids in advance so as to avoid any error while presenting.

Therefore, options A, B should be done when using presentation aids.

6 0
3 years ago
Ashley wants to know the oldest form of both water purification and waste disposal. Help Ashley determine the methods. The oldes
polet [3.4K]

Answer: Distillation and Landfill

Explanation:

Distillation is the old method of water purification, these process involves the separation of compounds or components of a mixture based on their different boiling points. Today we have advanced method of seperation, although Distillation is still being used.

Land fill is one of the oldest form of waste disposal, these method involves digging up a large land mass(depending on the waste to be disposed) and dumping the water into the dugged land mass, then cover it up with the sand that was dugged out. Today, they are more advanced ways to handle wastes such as incinerator.

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Jeremy Bridges is an executive for Green Web Designs, where his primary role is to ensure the security of business systems and d
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Answer:

Chief Security Officer

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According to the given statement in the question the Jeremy's role in the company is "Chief Security Officer (CSO)".

The chief Security officer has the role of developing and looking on to the strategies and policies that are required for maintaining the operational, strategic, financial and reputational security  of the  overall company.

6 0
3 years ago
The major objective of this lab is to practice class and object-oriented programming (OOP), and separate files: 1. We will reuse
vovangra [49]

Answer:

Implementation of resistor.cpp

#include "resistor.h"

Ohms::Ohm()

{

// default constructor

voltage=0;

}

Ohms::Ohm( double x) // parameterised constructor

{

voltage = x; // voltage x set to the supply voltage in the private data field called voltage

}

Ohms:: setVoltage(double a)

{

voltage = a;// to set supply voltage in private data field called voltage

}

Ohms::setOneResistance( String s, double p)

{

cin>>p; //enter the resistance value

if(p<=0) // if resistance is less than or equals to 0

return false

else // if re

cin.getline(s);

}

Ohms::getVoltage()

{

return voltage; //return voltage of ckt

}

Ohms::getCurrent()

{

return current; //return current of ckt

}

Ohms:: getNode()

{

return resistors; //return resistors of ckt

}

Ohms::sumResist()

{

double tot_resist = accumulate(resistors.begin(),resistors.end(),0); //std::accumulate function for calculating sum //of vectors and following are the starting and ending points

return tot_resist;

}

Ohms::calcCurrent()

{

if(current <=0) // if current is less than or equal to 0

return false;

else   // if current is greater than 0

return true;

}

Ohms:: calcVoltageAcross()

{

if(voltage<=0) // if voltage is less than or equal to 0

return false;

else //if voltage greater than 0

return true;

}

Explanation:

in the case of main.cpp its simple just make a class object and remember to include resistors.cpp with it for which the second last picture describes the process precisely. (Hint: Use theunit test case functions in the main.cpp).

As you can see node is a structure consisting of member variables, followed by a class Ohms representing a DC circuit.

By looking at these pictures, it is needed to implement the main.cpp and resistor.cpp files. The user defined header file resistor.h already consists of all contents of Class Ohm, struct node. You don't need to modify it in anyway in such case.

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