What effect does reducing your carbon footprint have on the environment?

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain