A firefighter is shown here using a fire hose to put out a jet fuel. As the water leaves the hose, the firefighter notices that the hose is pushing backwards. Which of these statements explain this phenomenon? Select ALL that apply.

The answer is "a fireman turns on a hose and is knocked backwards" because the force of the water going out of the hose is equal and opposite to the force pushing backwards on the fireman.

Explanation:

Newton's 1st Law: The law of inertia.

answer is a

explanation:

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.