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# JEE Free Doubts and Solutions

## I want detailed information about this equation... ∆m=(h÷c^2)×[{1÷T2}-{1÷T1}] Here ∆m =change in Mass.           c= speed of light.           h =planks constant.           T =time.

Asked by Sainishrichand 16th January 2020, 10:25 PM

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## Find the angle subtended by the line seg AB at the origin A(√3, -1),B(√3,1)

Asked by yugalsalunke.ys 15th January 2020, 7:08 PM

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## For the equations cos(4y-3x-2)-cos(4y+3x+2)=2+2(ln(k^4-255))^2 and cos(4y-3x-2)-cos(4y+3x+2)=2k+8 The possible value of k is??

Asked by amritchirania 10th January 2020, 3:28 PM

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## Why water wave can't  be polarised although its a transverse in nature

Asked by ashutosharnold1998 8th January 2020, 3:19 AM

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## Which of the these can be polarised

Asked by ashutosharnold1998 6th January 2020, 9:45 AM

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## A particle performing shm x=Asin(wt+π) . Find from where particle starts motion and in which direction initially move

Asked by ashutosharnold1998 5th January 2020, 12:46 AM

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## What  is moment of inertia about centre of a rectangle

Asked by Raymangoel13062000 3rd January 2020, 5:14 PM

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## Find elongation in rod? here why rod is elongate while there is no strain

Asked by ashutosharnold1998 26th December 2019, 1:01 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:20 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:19 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:18 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:11 PM

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## Detailed solution for this.

Asked by g_archanasharma 16th December 2018, 6:09 PM

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## Sir pls solve this question.

Asked by rsudipto 15th December 2018, 6:13 PM

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## 2nd and 3rd

Asked by StarBoy 15th December 2018, 2:25 PM

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## Sir in this question how is the inverse fn derived. Pls explain in details.

Asked by rsudipto 15th December 2018, 8:55 AM

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## Sir pls solve this question.

Asked by rsudipto 14th December 2018, 9:52 AM

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## Sir pls solve this question.

Asked by rsudipto 14th December 2018, 9:51 AM