If a 20 gram piece of copper at 50oC touches a 10 gram piece of copper at 90oC, in which direction will heat flow? Estimate the final temperature once both pieces of copper reach thermal equilibrium and explain your estimate. a)
the heat flows from the 10 g piece to the 20 gram piece and final temperature is about 70oC because they are both made out of copper
b)
he heat flows from the 20 g piece to the 10 gram piece and final temperature is about 50oC because the hot piece has lower mass

yessir

Explanation:

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.