Indicate the types of mechanical energy that are present in the following situation. a punk sliding along level ice and is slowing down. a) Kinetic Energy
b) Potential Energy
c) Both
d) Neither​

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.

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Where do magnetic lines of force enter earth?