Jim thinks that he can throw a baseball six meters per second. What does the six meters refer to? (2 points) a
The speed the baseball travels in six seconds.

b
The distance the baseball travels in one second.

c
The distance the baseball travels in six seconds.

d
The time it takes the baseball to travel one meter.

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.  

the dissolution of polymer can be thermodynamically described in 2 steps.