A. Adding the number of protons and number of neutrons in the atom
Electrons are so incredibly small that the number of electrons makes almost no difference in the atomic mass. So b and c are not the answer.
D doesn't really make sense because like if you want to know the mass of a basket of apples and oranges, you'd add up the apples' and oranges' masses, not subtract.
Answer:
The answer is D.
Explanation:
They both orbit around the sun so they are similar in that way.
You haven't said whether the two resistors are connected
in series or in parallel. It makes a difference.
-- If they are in series, then their combined effective resistance is
(3 + 2) = 5 ohms.
Current in the circuit is (voltage)/(resistance) = 1.5/5 = 0.3 Amp.
-- If they are in parallel, then their combined effective resistance is
(3 x 2) / (3 + 2) = (6/5) = 1.2 ohms.
Current in the circuit is (voltage)/(resistance) = 1.5/1.2 = 1.25 Amp.
The area of the Earth that is most similar to the Sun's convection zone would be the mantle. The convection zone of the sun is its outermost layer where heat transfer by convection happens which is similar to the Earth's mantle. It would be the crust because it is the outer most layer.
