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VOLUME 7,ISSUE 7,JULY,2020

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Author Names : Zuraidah Tharo1. Hamdani2, Melly Andriana3, Solly Aryza4, Siti Anisah5 Faculty Science and Technology, Universitas Pembangunan Panca Budi Medan North Sumatera, Indonesia

Author Names : Narender Kumar Departmentof Physics, Vaish College Bhiwani, Haryana127021