Select all that apply. which of the following statements are true?
a solid can diffuse into a liquid, but a solid cannot diffuse into another solid.
a solid can diffuse into both a liquid and another solid.
a liquid can diffuse into another liquid.
a gas can diffuse into another gas.

Is a pencil falling to the floor anon contact force, a force, or a contact force

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.

Pinene is an unsaturated hydrocarbon found in pine resin. if pinene has m+ = 136 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula? enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts. the formula is case-sensitive