How geography helped shape the civilization of Nubia

What would happen to the tides if there was no moon and no sun in the sky?

An object weighs 40n in air , weighs 20n when submerged jn water and 30n submerged in a liquid of unknown density .what is the density of the liquid?

Risk of harm in social and behavioral sciences generally fall in three categories, which are: breach of confidentiality, loss of autonomy, and study proceduresstudy procedures, breach of confidentiality, and loss of employmentinvasion of privacy, adverse reaction to study drug, and discriminationinvasion of privacy, breach of confidentiality, and study procedures