Which circumstances could be sources of eror when doing an experiment
not fully submerging the object when doing the fluid displacement procedure

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

Anybody wanna ? (picture included? )

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n