When we study (4), or the study of matter and energy, we need to know two things to figure out how fast an object is going. First, we need to know how far the object traveled, or the (5). Second, we need to know how long it took the object to reach its destination, or the (6). By dividing the total distance by the total time, we can find the (7) of the object. This speed can be used to find the amount of (8) the ball has (the energy of motion).

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.

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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.  

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.