If the coolant in an air conditioner has a higher temperature than the air in a building, then a. heat will flow from the air into the coolant b. no heat flow will take place c. heat will flow from both the coolant and the air d. heat will flow from the coolant into the air

Heat will flow from the coolant into the air.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .