When you lie down on a mattress the force of pulls your mass towards the floor, while the force of the mattress pushes back up resulting in forces, which allow you to sleep comfortably.

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds

What element has similar physical and chemical properties as boron.