Which of the following objects have momentum? Select all that apply. a
an electron is orbiting the nucleus of an atom

b
a flea walking at a constant speed on a dog's back

c
High School building

d
a Honda Prius moving at 70 mph

e
a UPS truck stopped at the side of the road

a. an electron is orbiting the nucleus of an atom

b. a flea walking at a constant speed on a dog's back

d. a Honda Prius moving at 70 mph

Momentum can be defined as quantity of motion present in a body. It is also called "mass in motion." All objects have mass so if an object is moving, then it has momentum. In terms of an equation, the momentum of an object is equal to the mass of the object multiply by the velocity of the object.

So in conclusion, option a, b and d having momentum.

Learn more about mass here: link

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.