Which of the following is not an example of work?

a: picking up a box off the floor

b: raising a barbell over your head

c: holding a tray in the cafeteria line

d: pushing a box across the floor

C. Cause your just standing in line holding a tray.

Iwould say the answer is d

Hellosubatomic particles  are  particles  that are smaller than the atom. protons, neutrons, and electrons are the three mainsubatomic particles  found in an atom. protons have a positive (+)  charge. an easy way to remember this is to remember that both neutron and no  electrical charge  start with the letter "n."have a nice day