Which of the following is true about the simple machine shown in red

a. it shortens the distance needed to carry objects into the truck

b. it reduces the weight of objects being carried into the truck

c. it reduces the size of the force needed to carry objects into the truck

d. it reduces the amount of energy needed to carry objects into the truck

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

it takes on an electronical energy