Identify two things you can understand by looking at this model of our solar system that would be difficult to see if you looked at the sky from Earth. Provide evidence to support your claim, and explain your reasoning.

In a system, when potential energy decreases, then entropy also decreases. true false

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.

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?