Answer:
Hope it helps..
Explanation:
Let n be the number of the vernier scale division which coincides with the main scale division. Rotate the vernier caliper 90° and repeat the steps 4 and 5 for measuring the internal diameter in perpendicular direction. To measure the depth, find the total reading and zero correction.
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melting point of a substance depends on pressure too. at high pressure , the melting point also shifts to higher level. and at low pressure , the melting point shifts to lower level. the inner core of earth is mostly made of iron and temperature inside earth is much higher than the normal melting point of the iron. so ideally the iron inside the core must be in molten state but in reality it is in solid state there because the pressure at the core is very high. due to this high pressure , the melting point of the iron becomes higher than its normal value and hence it does not melt inside the core.
the answer is gravity
gravity pulls things down
The displacement is 6.4 Km.
<h3>What is the displacement?</h3>
We know that displacement is a vector quantity. We define displacement as the change in the position of a body in a specific direction. Since we know that the displacement is a vector quantity, the problem must be solved geometrically.
Hence;
The displacement is going to be obtained from;
7 Km - 2 Km = 5 Km
Hence
Displacement = √(5)^2 + (4)^2
= 6.4 Km
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Answer:
A. They have the same atomic numbers.
Explanation:
Elements are defined based on the atomic number, which is the number of protons in the nucleus: this means that atoms of the same element have always the same number of protons in their nuclei (and so, always the same atomic number).
The other choices are wrong because:
B. They have the same average atomic masses. --> this is false for isotopes, which are atoms of the same element having a different number of neutrons. Since the atomic mass is calculated from the sum of the masses of protons and neutrons in the nucleus, two isotopes of the same element have different atomic mass
C. They have the same number of electron shells. --> this can be false when an atom of an element loses/gains an electron, becoming an ion: in that case, the number of electron shells can change, since the number of electrons has changed.
D. They have the same number of electrons in their outermost shells. --> this is also false in case one of the atoms is an ion, since the number of electrons is different.