Hello guys ! I decided to create this note to provide a platform for the young students on Brilliant to interact with one another profitably. If you approve of this note, you can join in the discussion. Thanks !

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TED is helpful and free and it is non-profit so this organization really is devoted to education. I also watch their talks and their motto : Ideas worth spreading is awesome. I look forward to their Ted ed riddles so overall: EXCELLENT !!

Guys !!! Do you know that the definition of kilogram is changed after 130 years !!!

The kilogram or kilogramme (symbol: kg) is the base unit of mass in the International System of Units (SI). Until 20 May 2019, it remains defined by a platinum alloy cylinder, the International Prototype Kilogram (informally Le Grand K or IPK), manufactured in 1889, and carefully stored in Saint-Cloud, a suburb of Paris. After 20 May, it will be defined in terms of fundamental physical constants. The new definition is based on invariant constants of nature, in particular the Planck constant which will change to being defined rather than measured, thereby fixing the value of the kilogram in terms of the second and the metre, and eliminating the need for the IPK. The new definition was approved by the General Conference on Weights and Measures (CGPM) on 16 November 2018. The Planck constant relates a light particle’s energy, and hence mass, to its frequency. The new definition only became possible when instruments were devised to measure the Planck constant with sufficient accuracy based on the IPK definition of the kilogram.

Kibble balance at National institute of Standards and Technology (NIST). Devices like this can weigh objects using the new definition of the kilogram in terms of the Planck constant.

@EKENE FRANKLIN Depends on how much you already know..............If you have to start from scratch, I would suggest reading from Resnick and Halliday.......!!! But, if you are well versed with the topic, then you can also check out this book by Griffiths............

Guys ! Did you notice that a new icon is added to the tool bar when we write a question called "glossary". I pressed it but nothing happened. Does anybody know for what is it meant ?

Hey @Ram Mohith it is an accident that that is being shown to regular members – it is a staff-only feature. You can see it in action in some courses like this one.

Hey guys, i think in my problem 'partial dice'
I have by mistake written a wrong answer.please check if answer matches my solution or no as i m not able to see the answer.

Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

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## Comments

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TopNewestHas anyone been notified of the changes coming to Brilliant ?

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No

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Yes

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Ok. Cheers!

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Hi Guys !!! I am @Ram Mohith

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Hello, Ram !!! Please you may invite some Brilliant young students to this note. Thanks.

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I have invited a few of them who are active in our previous note. You can specify any names of the users whom you want to participate in this discussion.

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@Mohmmad Farhan I think you are a user of Ted Ed. I want your review about it.

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TED is helpful and free and it is non-profit so this organization really is devoted to education. I also watch their talks and their motto : Ideas worth spreading is awesome. I look forward to their Ted ed riddles so overall: EXCELLENT !!

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@X X, @Manuj Rajpal, @Syed Hamza Khalid, @B D, @Mohmmad Farhan and others this is the continuation of Ekene Franklin's MessageBoard

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Thanks!

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Hello...Nice to meet everyone

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hello

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Hi

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Hi

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hi

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Guys !!! Do you know that the

definition of kilogram is changed after 130 years!!!The kilogram or kilogramme (symbol: kg) is the base unit of mass in the International System of Units (SI). Until 20 May 2019, it remains defined by a platinum alloy cylinder, the International Prototype Kilogram (informally Le Grand K or IPK), manufactured in 1889, and carefully stored in Saint-Cloud, a suburb of Paris. After 20 May, it will be defined in terms of fundamental physical constants. The new definition is based on invariant constants of nature, in particular the Planck constant which will change to being defined rather than measured, thereby fixing the value of the kilogram in terms of the second and the metre, and eliminating the need for the IPK. The new definition was approved by the General Conference on Weights and Measures (CGPM) on 16 November 2018. The Planck constant relates a light particle’s energy, and hence mass, to its frequency. The new definition only became possible when instruments were devised to measure the Planck constant with sufficient accuracy based on the IPK definition of the kilogram.

Kibble balance at National institute of Standards and Technology (NIST). Devices like this can weigh objects using the new definition of the kilogram in terms of the Planck constant.

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Yes, read about it. Mole, ampere, kelvin are also being redefined

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Me too.

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Hello guys !!! Does anyone know a good place where I can get good exhaustive books on Electricity and Magnetism ?

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@EKENE FRANKLIN Depends on how much you already know..............If you have to start from scratch, I would suggest reading from Resnick and Halliday.......!!! But, if you are well versed with the topic, then you can also check out this book by Griffiths............

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Thanks!!

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Also, Hello!!!!

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Guys ! Did you notice that a new icon is added to the tool bar when we write a question called "glossary". I pressed it but nothing happened. Does anybody know for what is it meant ?

@Calvin Lin and @Silas Hundt

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Nope.

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Same here

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Hey @Ram Mohith it is an accident that that is being shown to regular members – it is a staff-only feature. You can see it in action in some courses like this one.

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Hey guys, i think in my problem 'partial dice' I have by mistake written a wrong answer.please check if answer matches my solution or no as i m not able to see the answer.

Pls pls pls tell

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In that question; how is the answer 5? though your solution says 0.46? Shall I file a report asking the staff to change the answer?

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Your question has been resolved by @Brilliant Mathematics

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