A ball is on a shelf 6.5 feet from the floor. The ball is bumped and rolls off the shelf, what is the velocity of the ball just before it hits the floor? the ball has a mass of 0.56 pounds. the height of the ball is m

the mass of the ball is Kg

The gravitational potential energy is J

the kinetic energy is J

the velocity of the ball is m/s

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.  

yes

ya te ayud espera