What Is Dimensional Formula?

Dimensional formula and dimensional equations of a physical quantity are defined as the fundamental quantities that are raised to powers to express the physical quantity. The basic dimensional formula of mass is [M], the length is [L] and time is [T].

Dimensional Equations and Formulas

The other way of defining dimensional formula is, the physical quantities are expressed in terms of their basic units. For example, the dimensional formula of force is given as:

F = [MLT-2]

The unit of force is Newton or kg.m.s-2.

For any physical quantity, the dimensional formula is written when its relation with other physical quantities is known. Following is a table of the dimensional formula of a few quantities.

Physical quantity
Relation with other physical quantities
Dimensional formula
SI unit
Area
Length * Breadth
[L]*[L] = [M0L2T0]
m2
Volume
Length * Breadth * Height
[L]*[L]*[L] = [M0L3T0]
m3
Density
(Mass)/(Volume)
[M]/[L3] = [ML-3T0]
kg.m-3
Energy
Work
[ML2T-2]
J
Impulse
Force * Time
[MLT-2]*[T] = [MLT-1]
N.s

What is dimensional equation?


The dimensional equation is defined as the equation with dimensional formula. By equating the dimensional formula on the right-hand side and on the left-hand side, the dimensional equation is obtained. This is proved with the help of the principle of homogeneity.

What is the principle of homogeneity?


The principle states that the dimensions on the left-hand side of an equation must be equal to the dimensions on the right-hand side. Using the principle of homogeneity one can even convert the units from one system to another. Example of the principle of homogeneity is as follows.

Dimensional equation of v = u + at is:
[M0LT-1] = [M0LT-1] + [M0LT-1] * [M0L0T] = [M0LT-1].

What are the uses of dimensional equations?


Following is a list of uses of dimensional equations.

     It is used to check the correctness of the physical quantity.
     It can be used to derive the relation between different physical quantities.
     The dimensions of constants can be found using the dimensional equation.

What are the limitations of dimensional analysis?


Following are the limitations of dimensional analysis.

     There is no information about the quantity being scalar or vector quantity.
     The formula cannot be derived if the quantity depends on more than three factors.
     Dimensional analysis cannot be carried for functions like logarithmic functions, exponential functions, and trigonometric functions.

Interested to learn more about dimensional analysis and other Physics related concepts like wavemotion, types of dc motors, etc, visit BYJU’S.

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Using Social Media Data and Analysis to Create a Story

We talk a lot about social media reporting - and we know we’re not the only ones - but when you pull a social media report, all you’re really doing is collecting a bunch of numbers and organizing them into one place.

Doing this can be useful of course, but without taking the time to analyze the numbers at all or offer up what the numbers mean using any kind of storytelling really isn’t going to do you, or your company, much good. Showing reports and dashboards can be overwhelming if there’s no story to go along with it.

Social Media Data and Analysis
Pixabay

In order for you to figure out what’s happening with the numbers, you’ve got to do a little data storytelling. Stories based on data can be useful tools for stakeholders and customers, because they can help you make better decisions.

Now, we know that this isn’t an easy task. Data storytelling takes practice and we’ve put together some things for you to keep in mind when you’re looking at your next set of numbers:

Best Practices for Data Storytelling 


1] Start with the big picture


Anytime you’re dealing with data, it’s good to start with the high-level data and then drill down, so follow this same method when you’re building your story.

2] Show context


It’s a great practice to keep track of everything when you record your data, such as when you relaunched the website or if the site was down one day, so this way you can offer some factual context and explanation where possible.

3] Highlight the important drivers


What are the factors that affect the numbers in your story? Is it social media? Is it a really great blog post? Are there outside factors that are threatening the numbers? All of this information, and anything directly related to the story you’re trying to tell should be included.

4] Let the data tell the story 


This is probably the most important tip of all. Don’t create a story and then use data to support or deny what you’re saying. Always let the data lead the way.
Whatever you do, do NOT:

  • Manipulate the data or change the scale
  • Cherry pick the data
  • Lie 

Never, we repeat, never do any of the aforementioned! Present honest data and show the entire picture, even if it’s not a favorable one.

Don’t pick and choose the numbers that support your case. And no matter what, never change the numbers or lie about the data. It’s just not going to go well if any of this happens. Keep things honest. Reminder: Always let the data lead.

When you’re looking at all of your numbers and are trying to figure out the story, start with figuring out what question you are trying to answer with this data set.

Is the question, “Why did we experience a significant drop in website traffic on a certain date?” or is it, “What caused a spike in downloadable white papers last month?” Start with this question and then show the data to reach your answer.

Using Social Media Data and Analysis

Data stories explore and explain how and why numbers change over time, usually through three things.

  1. Visualization
  2. Narrative 
  3. Context
Creating some visuals based on the data may help you create your story. These can be charts, graphs, spreadsheets - anything that’s going to add a visual element and make the data sets easier to see and understand. From there, you’ll start to build your narrative using the data and adding any relevant context surrounding it.

Remember that your social media analysis doesn’t have to be complex. If you’re answering a simple question such as, “Why did our website have zero traffic for a 48-hour period?” and you have clearly marked that the server crashed on that day, bam, there’s your story.

Just remember to be real, open, and honest. Make decisions after the data is presented, not before.

One other method you can use to create a data-driven story is the “How we got here” method, which simply walks through the data in chronological order. This method calls for simple analysis and doesn’t leave anything out.

Your first data story may not be glamorous, but offering up some insight is going to help you and your stakeholders better understand what the data is telling you, and from there, you’ll be able to make, informed decisions when it comes to your social media marketing strategy. 
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The Best Mobile Apps for Online Trading

Since US Securities and Exchange Commission approved online trading for binary options, millions of beginners and professional investors have flocked towards it. 

The growing hype around online trading has gained a lot of attention across the globe which has resulted in an increase of online trading platforms available for investors. 


Best Mobile Apps for Online Trading

Following are some advantages why one should consider online trading via suitable mobile trading applications:

Benefits of Online Trading via Mobile Apps 


1] Security:


Most mobile trading apps which are available for people’s usage have built-in security features that make it hack-proof and safe. Considering the vulnerable nature of online trading, leading trading platforms have developed encrypted firewall to protect the user’s information and transaction details. 

2] Variety of Tradeable Assets:


Some of the leading and most-used mobile trading apps allow their users to trade with an array of different tradable assets. For example, binary options, commodity, cryptocurrencies, stock, CFDs etc. 

It should be noted that only some licensed brokers can provide traders and investors alike to trade and acquire profitable returns by trading all the tradable instruments.  

3] Easy Bonuses and Returns:


It becomes easier and far more convenient for mobile traders to collect their bonuses and profit returns at the end of trade via their app. Experienced investors know that the first sign of trouble is when a certain trading platform overstates the average return. In order to steer clear of such dubious brokers, traders should gather more information regarding regulated and trustworthy mobile trading apps. 

4] Easy to Use:


Nowadays any trader doesn’t have to sit for hours next to their computer to secure trade/transaction. 

The most popular mobile trading applications are by IQ Option that comes with easy navigational and operational tools which makes online trading effortless for beginners as well as veteran traders. Some apps even let traders handle multiple accounts simultaneously with ease. 

Available for All Operating Systems.

The best thing about mobile trading apps allowing online trades is that these are developed to support two of the most used operating systems in the world namely, Android and iOS. 

On the other hand, there are numerous investors interested in online trade are now able to utilise apps like IQ Option, eToro, BDSwiss, CMC Markets etc. 

How does Online Trading Works Through Mobiles? 


  • A long time ago, top-notch mobile phones such as iPhones and Blackberry were only used to monitor the performance of stocks. But now it is possible to even trade via online trading platforms on your mobile phone with the help of simple applications. Below are step-by-step instructions on how to start mobile trading via mobiles. 
  • The first thing that comes with online trading is to choose anonline broker that has its own mobile application allowing trades and collecting returns. One must make sure that the chosen trading app is authentic, easy-to-use, easy-to-install, free from malware, supports the mobile phone’s OS and does not allocate a lot of space in your phone. 
  • After choosing the mobile application you need to download it either directly from the official site like IQ Option whose APK can be easily downloaded from their website www.iqoptionmag.com. As mobile trading is slowly gaining momentum, the number of scams and risks is also spreading at an exponential rate.  
  • After installing the chosen mobile trading app, users may either register or sign up at the trading platform. The registering option is for new users or beginner-level traders who do not have a pre-existent account on the trading platform that they have opted for.  

As countless transactions are held online each second, some technical issues are bound to happen which can be countered by opting for a safe, functional and responsive mobile trading platform such as the following; 

  1. IQ Option 
  2. BDSwiss 
  3. CM Trading
  4. EToro 
  5. 24Option

Among all the above-mentioned famous online trading platforms, IQ Option is an established broker that provides binary options trading for users based in non-European countries. 

Distinguishing Features of IQ Option 

Licensed & Regulated 


IQ Option which is registered in Cyprus by the name of IQ Option Europe Ltd is lawfully regulated by CySEC. 

This committee is responsible for protecting investors and traders from fraudulent trading platforms and most notorious Ponzi schemes circulating across different online trading platforms. Brokers which are regulated by CySEC are directly held accounted for mitigating risks. 

Tradable Instruments:


Being a noteworthy and licensed online broker, IQ Options offers a set of tradable instruments such 
as:

  • Forex pairs 
  • Stocks  
  • Cryptocurrencies 
  • Commodities 
  • And also, digital options on some currency pairs. 

IQ Options is also known for supporting OTC binary and digital options over the weekends for interested traders. 

User-friendly Trading Platform:

User-friendly Trading Platform

IQ Option’s cutting-edge online trading platform is accessible from personal computers (web version) and even through mobile phones (application). The platform supports the most prevalently used operating systems on mobile devices such as Android and iPhone.  

Types of Accounts Available:


It offers a safe-to-use free demo account for first-time users which is fully functional. Meaning, the demo account has all the features of a full-fledged registered live account but has no risks attached to it. 

Beginner level traders use it for trading practice and then switch to live trades with a minimum deposit of $10 to gain maximum profits. 
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What Does a Video Format Actually Do?

As you were probably aware, videos are stored in a variety of formats – just like most other types of media files. But what you may not know (at least not fully) is what video formats actually do.

In a broad sense, video formats are responsible for storing the data that makes up the video. To accomplish that they require two parts: A video codec and a video container.


Video Format
Pixabay

“What Does a Video Codec Do?”


The video codec is the part of the format that is designed to compress the video data so that it can be stored in a manner that occupies less space. That is important seeing as uncompressed video data is very large, and can even range into hundreds of GB – or more.

To compress it the data is encoded using the video codec. That requires various compression algorithms that can either be lossless or lossy.

If the compression is lossless, the data can be decoded and decompressed at any time into an exact replica of the original. However if it is lossy some data that is considered redundant is discarded, and when the video is decoded it won’t be exactly the same as the original.

Most of the codecs you run into (and the videos that use them) are bound to be compressed using lossy compression to make them suitable for delivery. Lossless compression in videos is almost always only used during professional video production.

In order for the video to be viewed its data needs to be decoded, which requires either a hardware or software decoder. Both can play the video, but hardware decoders require less processing power.

If no decoders are present the video format won’t be supported, and the video won’t be able to be viewed.

“What Does a Video Container Do?”


In contrast to the codec, the video container’s role is a bit more ordinary: It acts as a wrapper that holds together all the video data as well as any other components that may be required.

Different containers support different range of components, which sometimes determine the features that are enabled in the video too. For example some may support captions, titles, chapters, menus, streaming, 3D video, and so on.

The video container is also responsible for the extension that the video is stored in. That being said some containers are very similar to one another, and for example if you want you could learn how to convert M4V to MP4 using Movavi Video Converter, or you could just rename the extension.

Suffice to say the extension is not the video format (contrary to popular belief) but just part of it.

 Conclusion


To sum it up the video container consists of both its container as well as its codec. Together they are in charge of the compression, compatibility, and the features that can be supported.

As you can imagine that makes the video format important in a practical sense as it will affect whether or not you can view certain videos, and the overall file size of the video too.
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What Is the Difference Between a Thesis and a Dissertation

As it is, most people even students cannot clearly state the difference between a Ph.D. dissertation and a thesis. This is not necessarily because they do not understand the terms, but rather because they are normally used interchangeably.

It is difficult to point out distinctive differences between the two terms unless we use a specific context like an individual university. The reason being, while one college may use them interchangeably, another one will define them apart.

Difference Between Thesis and Dissertation
Pixabay

That said, the following are some of the differences between a thesis and a dissertation.

Length


Generally, the length of an academic paper will mostly depend on the course being taken or the specifications of the instructor. However, even with all these discrepancies, most theses are usually shorter than dissertations.

To complete a thesis, a master’s student will only need one semester and this is the only project they undertake. On the other hand, the doctoral candidate takes several years to research and put together a dissertation. Some dissertations my even go up to four hundred pages depending on the specific program of study.

Structure


Even though the structures of theses and dissertations do not vary by a major margin, there are a few differences that can be observed. For instance, a thesis statement will only give a brief explanation of how an argument will be proven.

In contrast, a dissertation statement should have a clearly stated hypothesis that should be justified by the end of the project.

thesis or dissertation

Nature of Research


A student doing their dissertation will be required to research extensively and get materials from many external sources. They are expected to be original even in the ideas they present and the matters they research about.

This explains why they also take longer periods of time to complete compared to theses. In contrast, thesis research does not have to be that involving.

Students use existing materials and refer to previous research projects to build on theirs. This helps in exhausting previous research projects with regard to the given suggestions.

Presentation


For both a thesis and a dissertation, the student is required to master the content and make an oral presentation to defend their project. However, the difference comes in the time required to defend each. A thesis defense can be done in just an hour while a dissertation defense may take several hours

Follow Up


In the case of a thesis, most students do not care what becomes of their project as long as they get a good grade out of it.

On the other hand, a doctoral student will research even more to develop and become an expert in the area they handled during their dissertation. A dissertation is done with the future in mind so that one can build on the findings.

Bottom Line


Even though the terms dissertation and thesis are often used interchangeably, the factors discussed here can be used to distinguish them. If you seek thesis writing help then you have an idea of how long it should take to have it done.
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How to Avoid the Most Common Financial Scams

Disclaimer: This post is sponsored by PSECU, a Pennsylvania-based credit union.
Since the invention of money, shady shysters have sought to line their own pocketbooks off the blood, sweat and tears of others. Although no one wants to consider themselves a sucker, scammers continue to bilk people out of millions of dollars annually.

Most Common Financial Scams
Source: Pixabay
Those seeking to defraud others prey on the good nature most people possess, as well as the emotions everyone experiences. Modern technology allows thieves new avenues for ripping off those caught unawares. However, those who educate themselves on common scam techniques can avoid falling victim.
Check, Please! 
In these uncertain financial times, who doesn't fantasize about receiving an unexpected check in the mail, a lucrative work-from-home position or both? Scammers attack the economically vulnerable, since they know poverty persuades many to believe an easier path to prosperity must exist.
Check-cashing scams often stem from legitimate employment searches. Cybercrooks target job-seekers with opportunities for easy income by processing checks for their overseas clientele. 
The thieves mail victims a realistic-looking check with instructions to cash it, return a certain amount via money-wiring services and keep the rest as their "salary."
Often, the checks appear so realistic, even banks don't catch the fraud until after the victim has spent their so-called wages. Victims then face hefty overcharge fees for all money cleared after depositing the fake check, and may face criminal conspiracy charges in extreme repeat cases. 
Avoiding this scam proves simple: Never cash checks from an unverified source and never wire funds back to the initial sender.

We Need You 

Most people possess generous spirits, and natural disasters prompt many to open their wallets to their charity of choice. However, those receiving solicitations for donations via phone, email or social media messages should hesitate before whipping out their credit card.
To avoid charity scams, only donate to well-known organizations. If contacted by phone by someone soliciting aid, inform the caller that a donation will be made through the charity's website.

Illegal Access 

Ironically, many online scammers trick victims into revealing their passwords and other important information, like credit card numbers, under the guise of needing to verify their identity due to a breach of their account.

Never provide email passwords, Social Security numbers or credit card information via email or to unsolicited phone callers.
When an email indicates a data breach, research online to see if others have experienced the same thing. Refrain from posting chain-letter breach scams on social media. Those silly "I got a friend request from myself" messenger threads only annoy those who recognize the hoax, so don't pass on any warnings not covered in the news.

I, Robocall 

Every day, millions of Americans pick up the phone, say hello - and meet with a robotic voice urging them not to hang up before learning how to cut credit card bills by two-thirds, qualify for student loan forgiveness or enjoy an all-expenses-paid cruise.
The best rule of thumb for dealing with robocalls? Simply hang up. Go even further by registering with the Federal Do-Not-Call list and reporting unwanted phone solicitations. The volume of calls may not decrease immediately, but multiple reports aid prosecutors in holding those responsible accountable.

Wire Me the Money

Wiring money to anyone but well-known family members overseas generally spells trouble. Wiring funds to unknown individuals means waving goodbye to cash that will likely never be recovered.
Exercise caution when an online merchant only accepts payment via wire, as legitimate vendors offer ways to pay that don't include a visit to Western Union. Bank wire scams often target those seeking to purchase prescription medications without a scrip from a doctor, especially in the U.S., where many lack health insurance and sufficient funds to visit a physician for regular med checkups.

The Tax Man Calls 

CPAs and enrolled agents advise their clients that taxing authorities initiate contact via U.S. mail, not phone or email, when sending correspondence. However, savvy scammers imitate IRS agents so well, thousands get suckered into paying nonexistent liabilities with gift cards.

Understand that all taxing authorities must follow certain rules of procedure when attempting to collect tax debt. The IRS website expressly informs taxpayers that the first step they take when collecting debt involves sending a snail-mail letter to the debtor's last known address.
Hang up on calls from people claiming to be tax collectors and contact the appropriate entity directly to determine if liability exists. Report repeated calls from the same number to the FCC or local law enforcement, who will aid in filing charges, if possible.

Stay Savvy and Safe

Criminals who fail at their pilfering schemes eventually give up and move on. Still, even when authorities apprehend one fraudster, others wait to take their place.

By ignoring unsolicited phone calls and emails and by verifying any amounts won or owed directly with the responsible institution, everyone can help prevent others from losing their shirts in shady scams.
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