What is a 3 letter (all lowercase) word that sits in the middle of the milky way? {planets rotate and revolutionize around }

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Which one of the following research methods can show cause and effect