How can Calculators be More Efficient to Users?

Studying mathematics for the sake of mathematics, formulation of conjectures to model real life situations and indeed the application of mathematical knowledge has helped to improve insight about nature.

The advances in pure mathematics, natural sciences, engineering, medicine, finance and the social sciences has lead to the formulation of more practical problems requiring practical solutions. Some of these needed solutions however pose a great strain on the human numerical capacity, hence the need for calculators.

Antiquity supplied itself with a means to eliminate this strain on the human numerical capacity and indeed eliminate error in calculations. The first calculators were recognized as mere counting materials and devices; they were stones, pebbles, bones and the abacus.

It was not until the 17th century that the term calculating machine or mechanical calculator became widespread. Wilhelm Schickard built the earliest modern attempt at a mechanical calculator. His mechanical calculator comprised Abacus made of Napier bones which performed multiplication and division operations and a dialed pedometer which performed addition and subtraction operations. However, he was not very successful.

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How to Calculate and Solve for the Area, Length, Width and Height of a Cuboid | Nickzom Calculator

The image above represents a cuboid.
To compute the area of a cuboid requires three essential parameters which are the length, width and height of the cuboid.

The formula for computing the area of a cuboid is:

A = 2(lw + lh + wh)

Where:
A = Area of the Cuboid
l = Length of the Cuboid
w = Width of the Cuboid
h = Height of the Cuboid

Let’s solve an example
Find the area of a cuboid with a length of 5 cm, width of 3 cm and a height of 9 cm.

This implies that:
l = length of the cuboid = 5
w = width of the cuboid = 3
h= = height of the cuboid = 9

A = 2(lw + lh + wh)
A = 2(5 x 3 + 5 x 9 + 3 x 9)
A = 2(87)
A = 174

Therefore, the area of the cuboid is 174 cm2.

Calculating the Length of a cuboid when Area, Width and Height are Given

The formula is l = A – 2(w)(h) / 2(w) + 2(h)

Where;
A = Area of the Cuboid
l = Length of the Cuboid
w = Width of the Cuboid
h = Height of the Cuboid

Let’s solve an example:
Find the length of a cuboid with an area of 140 cm2 , a width of 4 cm and a height of 12 cm

This implies that;
A = Area of the cuboid = 140 cm2
w = width of the cuboid = 4 cm
h  = height of the cuboid = 12 cm

l =  A – 2(w)(h) / 2(w) + 2(h)
l = 140 – 2(4)(12) / 2(4) + 2(12)
l = 140 – 96 / 8 + 24
l = 44 / 32
l = 1.375 cm

Therefore, the length of the cuboid is 1.375 cm.

Calculating the Width of a cuboid when Area, Length and Height are Given

The formula is w = A – 2(l)(h) / 2(l) + 2(h)

Where;
A = Area of the Cuboid
l = Length of the Cuboid
w = Width of the Cuboid
h = Height of the Cuboid

Let’s solve an example:
Find the width of a cuboid with an area of 200 cm2 , a length of 5 cm and a height of 12 cm

This implies that;
A = Area of the cuboid = 200 cm2
l = length of the cuboid = 5 cm
h  = height of the cuboid = 12 cm

w =  A – 2(l)(h) / 2(l) + 2(h)
w = 200 – 2(5)(12) / 2(5) + 2(12)
w = 200 – 120 / 10 + 24
w = 80 / 34
w = 2.353 cm

Therefore, the width of the cuboid is 2.353 cm.

Calculating the Height of a cuboid when Area, Length and Width are Given

The formula is h = A – 2(l)(w) / 2(l) + 2(w)

Where;
A = Area of the Cuboid
l = Length of the Cuboid
w = Width of the Cuboid
h = Height of the Cuboid

Let’s solve an example:
Find the height of a cuboid with an area of 300 cm2 , a length of 6 cm and a width of 2 cm

This implies that;
A = Area of the cuboid = 300 cm2
l = length of the cuboid = 6 cm
w  = width of the cuboid = 2 cm

h =  A – 2(l)(w) / 2(l) + 2(w)
h = 300 – 2(6)(2) / 2(6) + 2(2)
h = 300 – 24 / 12 + 4
h = 276 / 16
h = 17.25 cm

Therefore, the height of the cuboid is 17.25 cm.

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The Use of Calculators in Underwater Research | Water Quality Index

Underwater research has provided guidance and opportunities for original researches to be conducted in the field of subtidal marine ecology. The research has been devoted particularly to the physiological process and limits of breathing gas under pressure, for aquanaut and astronaut training as well as for research on marine ecology.

Water quality index (WQI) is a means by which water quality data is summarized for reporting to the public in a consistent manner. It is similar to UV index or air quality index. Water quality index, as an area of activity under underwater research, is a 100-point scale that summarizes results from a total of nine different measurements when complete. These nice factors which includes:- dissolved oxygen, fecal coliform, PH, biochemical oxygen demand, temperature change, total phosphate, nitrates, turbidity and total solids, are chosen and some judged more important than the other, after which a weighted mean is used to combine the values.

The updated calculator used for this computation allows one to enter the longitude and latitude for the site under consideration or pick location from a Google earth map. The calculator completes the individual and group calculations of the aforementioned factors under consideration and permits one to generate a customized report.
The water quality index has a legend for grading range of values gotten at the final stage of each computation, which suggests the state of water falling between each range. The six widely used legends are excellent, very good, good, fair, marginal and poor.

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The Calculator Encyclopedia Computes the Significant Figures of a Number

According to Wikipedia,

The significant figures (also known as the significant digits) of a number are digits that carry meaning contributing to its measurement resolution. This includes all digits except:

  • All leading zeros;
  • Trailing zeros when they are merely placeholders to indicate the scale of the number (exact rules are explained at identifying significant figures); and
  • Spurious digits introduced, for example, by calculations carried out to greater precision than that of the original data, or measurements reported to a greater precision than the equipment supports.

Nickzom Calculator computes the significant figures of any given number.

For Example: apply 3 significant figures to 123876  and apply 2 significant figures to 0.00009872.

First, you need to obtain the Nickzom Calculator – The Calculator Encyclopedia app.
You can get this app via any of these means:

Web – https://www.nickzom.org/calculator-plus
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Significant Figures under the Mathematics section

On clicking the page or activity to enter the values is displayed.

From the first example: apply 3 significant figures to 123876
It implies that the number is 123876 and the number of significant figures to apply is 3.

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Nickzom Calculator Calculates Basal Metabolic Rate

According to Wikipedia,

Basal Metabolic Rate is a variant of standard metabolic rate measurement that excludes the temperature data, a practice that has led to problems in defining “standard” rates of metabolism for many mammals.

Basal Metabolic Rate is the rate of energy expenditure per unit time by endothermic animals at rest. It is reported in energy units per unit time ranging from watt (joule/second) to ml O2/min or joule per hour per kg body mass J/(h·kg). Proper measurement requires a strict set of criteria be met. These criteria include being in a physically and psychologically undisturbed state, in a thermally neutral environment, while in the post-absorptive state (i.e., not actively digesting food).

Nickzom Calculator is the very first calculator encyclopedia to come out from Nigeria. It is capable of solving over 50,000 calculations and presenting the steps (workings). Fortunately, Nickzom Calculator can solve for your body metabolic rate.

 

You can access Nickzom Calculator via any of these means:
Web – https://www.nickzom.org/calculator-plus
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have access to Nickzom Calculator proceed to the Calculator Map, click on Health | Fitness Calculator under Calculator section

Then, click on Basal Metabolic Rate

Up next, comes a page or activity to enter the values for the respective parameters needed in computing the basal metabolic rate. These parameters according to Nickzom Calculator are:

  • Age
  • Gender
  • Weight (in Kilograms)
  • Height (in Centimeters)

For Example: I am 23 years old. I am a male. I weight 105 Kilograms and I am 182 centimeters tall.

The screenshot below displays the values entered appropriately.

Now, click on Calculate

Therefore, according to Mifflin-St. Joer equation, my basal metabolic rate is 2,077.5 calories per day.

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Nickzom Calculator Calculates Body Mass Index

According to Wikipedia,

The body mass index (BMI) or Quetelet index is a value derived from the mass (weight) and height of an individual. The BMI is defined as the body mass divided by the square of the body height, and is universally expressed in units of kg/m2, resulting from mass in kilograms and height in metres.

Nickzom Calculator is the very first calculator encyclopedia to come out from Nigeria. It is capable of solving over 50,000 calculations and presenting the steps (workings). Fortunately, Nickzom Calculator can solve for your body mass index.

You can access Nickzom Calculator via any of these means:
Web – https://www.nickzom.org/calculator-plus
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have access to Nickzom Calculator proceed to the Calculator Map, click on Health | Fitness Calculator under Calculator section

Then, click on BMI Calculator

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How to Calculate the Difference between Two Dates | Nickzom Calculator

Have you ever wondered how you can know the difference between two dates down to the days, hours, minutes and/or seconds? I have.

I can remember when I thought of it. I wanted to know the number of days remaining for me to be done with my National Youth Service Corp Scheme. I then decided to develop an app that could tell me the difference in hours between two dates and also provide me with the information of other units as well. Curious much? yes.

Today, I would very much like to inform you that you can also find out the remaining seconds or minutes for the year of 2018 to be over.

To get answers for the difference between two dates is very easy. All you need are the two dates (start date and end date).

For the purpose of this post made on the 16th of December, 2018. I would like to know the number of minutes left for me to see 2019.

Therefore, our start date is 16 December, 2018 and our end date is 1 January, 2019.

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Why Should Everyone Use Nickzom Calculator?

Nickzom Calculator

 

The Nickzom Calculator has been in existence since 2013, launched on the 2nd of December, and has had major developments in its functionality till date with the Pro version Nickzom Calculator+ coming in place. This app is user friendly, easy navigation and requires no Internet connection after installation. Not enough, there’s more.

The Nickzom Calculator is a web, mobile and desktop platform that solves calculation problems and display the steps of the solution right to the final answer.

Now imagine you have a calculation to solve and you do not know how to go about it or you have consulted your textbook to see how various questions are solved and you’re utterly disappointed because, they solved only the simpler ones, or you don’t just get how the problem was solved. It is because of situations like this that Nickzom Calculator exists. This app solves calculations on Mathematics, Physics, Engineering, Chemistry, Finance, Accounting, Geology, Economics, Unit Conversions etcetera for quick and easy understanding.

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Advantages and Disadvantages of Calculators

The technology is booming, and modern innovations and technology has changed our lives. There is a huge debate in our society, whether students should be allowed to use a calculator from such a young age. The advantages are balanced by the disadvantages. The debate has both positive and negative sides.

Advantages of Calculator

This technology allows students solve complicated problems quickly and in an efficient manner. Additionally, it can reduce the problem to simpler tasks and allows the student to devote more time in understanding the problem. Secondly, they are saved from monotonous calculations and the same boring mundane procedure.

The above advantages help students to avoid boredom, and it does not demoralize their mathematical understanding. If mathematics is not made entertaining, pupils can feel bored, and it can demoralize their mathematical understanding.

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The Effect of Calculators in a Professional Workplace

As a Professional, be it in Mathematics, Engineering, Medicine, Physics or any other career path, there is indeed the need to use various tools or technology in your field to achieve high end results. Sometimes these technologies are seen to produce positive results. Other times, it seems to have adverse effects

When dealing with advanced Mathematical problems, or trying to prove mathematical theorems, lots of research work, mundane steps, and records of theses findings, must be put into consideration. For example a mathematician or physicist will have to understand some programming languages, like python, Matlab etc. to compute equations and generate graphical representation to back up proof of their findings, experiments or research work, in a means to describe in terms of numbers and figures for example, the rate at which an action occurs (like the force of gravity pulling a falling stone at 9.8m/sec^2). It might also be required as a guide in helping publish a professional work or findings to other professionals in the field.

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