A student pushes a 40-N block across the floor for a distance of 10 m. How much work was done to move the block?

400 Pascals
400 Newtons
400 Joules

400 Watts

Motivation cannot be developed with practice; a person either possesses it or they do not.

Predict the products butane (c4h10) + oxygen —>

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.