If you observe an object in the universe that is roughly 8 megaparsecs in size, what is the object most likely to be?
a.
elliptical galaxy
b. irregular galaxy
c. ultra-compact dwarf galaxy
d.
galaxy group
e. galaxy clusters

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.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2