You sand wood and at the end the dust floats into the air. is this a solution or a colloid?

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

What happens during the fall in september