… Gutenberg is a registered trademark, and may not be used if you charge for the eBooks, unless you receive specific permission. If you do not charge anything for copies of this eBook, complying with the rules is very easy. You may use this eBook for nearly any purpose such as cre…

…esian Journal of Electrical Engineering and Informatics (IJEEI), 2019 [Ref No.: 4169] md. sajid hossain utilizing gravitational energy as an alternative source to produce usable electricity Journal of Electrical and Power System Engineering, MAT Journals, 2019 [Ref No.: 4178] swa…