Physics GRE 1777 Solutions

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mohamedabdelhafez
Posts: 2
Joined: Tue Aug 08, 2017 9:33 pm

Physics GRE 1777 Solutions

Post by mohamedabdelhafez » Tue Aug 08, 2017 9:44 pm

Hello everyone!

I hope you are all doing well! This is Mohamed Abdelhafez, a postodc @ MIT. As ETS recently released a new physics GRE test (GR1777) https://www.ets.org/s/gre/pdf/practice_book_physics.pdf, I have written down full solutions for it as part of a course I was teaching and you can find them here : http://www.mit.edu/~mohamedr/PGRE1777_solutions.pdf

I decided to share them as a tribute to this site and fellow sites that helped me a lot in my applications!

Please let me know if you have any comments/corrections, and best of luck to all of you who are starting this long journey of applying to physics PhD! Also, feel free to send me questions you have regarding grad life etc. :wink:

Mohamed
Last edited by mohamedabdelhafez on Sun Jun 14, 2020 3:47 am, edited 1 time in total.

MohamedIBrahim
Posts: 1
Joined: Thu Dec 08, 2016 8:36 am

Re: Physics GRE 1777 Solutions

Post by MohamedIBrahim » Wed Aug 09, 2017 11:12 am

Thanks for your great effort

mohamedabdelhafez
Posts: 2
Joined: Tue Aug 08, 2017 9:33 pm

Re: Physics GRE 1777 Solutions

Post by mohamedabdelhafez » Tue Sep 05, 2017 1:07 pm

Dear all,

As some typos were pointed out, I updated the file today with the most recent version, so please download it again!

Qwaps
Posts: 36
Joined: Mon Mar 14, 2016 9:21 am

Re: Physics GRE 1777 Solutions

Post by Qwaps » Thu Sep 07, 2017 8:18 am

I saw question 100 on the PGRE I took in April 2016. Such a fun question to finish the exam with :)

Darrinallen
Posts: 5
Joined: Wed Jul 18, 2018 12:09 am

Re: Physics GRE 1777 Solutions

Post by Darrinallen » Wed Jul 18, 2018 12:16 am

Thanks for solutions. I am assuming this gr1777 exam is very representative of the actual exam

phy94
Posts: 5
Joined: Sun Mar 04, 2018 5:10 am

Re: Physics GRE 1777 Solutions

Post by phy94 » Thu Sep 20, 2018 3:49 am

Can someone confirm the answer to question 100?

pinchun
Posts: 1
Joined: Fri Oct 26, 2018 12:16 am

Re: Physics GRE 1777 Solutions

Post by pinchun » Fri Oct 26, 2018 1:16 am

I think the rms deviation of Prob.41 should be coming from
the binomial error, which is sqrt(N*p*(1-p)) = sqrt(100*0.1*0.9) = sqrt(9) = 3 rather
than sqrt(10), since this is a detect-or-not problem and should follow binomial
distribution rather than Poisson. Thanks!



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