Explanation:
Convection is primarily a mode of heat transfer which involves the movement of the particles of the medium. It is most notable in fluids i.e liquids and gases.
Gases makes up the atmosphere. Liquids makes up the ocean. Therefore, convection is possible in them.
The process of convection in the atmosphere and ocean is primarily due to density differences.
- In the ocean, heat from the sun warms the surface water and it is lighter. The water below is dense. As the surface water loses its heat, it becomes dense and therefore sinks. The sinking water is replaced by the cold water from below. This sets up the ocean currents powered by convection.
- In the atmosphere, air close to the ground is very warm. Warm air is light and it will rise. The air high up is cold and it will sink. The cold air will replace the warm air and vice versa. This is the convection in the atmosphere.
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The mass number represents the summation of the number of protons and the number of neutrons in the nucleus of an atom.
We are given that the mass number is 64 and that the number of neutrons is 35. Therefore:
number of protons = 64 - 35 = 29 protons
In ground state, number of protons in an atom is equal to the number of electrons. Therefore,
number of electrons = 29 electron
Using the periodic table, we will find that the element that has 29 electrons in ground state is copper.
The nuclide symbol of copper is shown in the attached image.
Answer:
<em>The revised periodic table could account for variations resulting from isotopes.</em>
Explanation:
Dmitri Mendeleev was the first person to form the periodic table.
There are certain draw backs in Mendeleev's periodic table which need to be amended.
One such problem is that Mendeleev's periodic table lacks separate place for isotopes of an element. The isotopes share the same place in his periodic table. Hence, if a revised periodic table was formed in which there are separate places for the isotopes of an element then this problem can be amended.
Answer is: volume of methane is 78.4 mL.
n(CH₄) = 0.0035 mol.
At standard pressure and temperature:
V(CH₄) = n(CH₄) · Vm
V(CH₄) = 0.0035 mol · 22.4 L/mol.
V(CH₄) = 0.0784 L · 1000 mL/L = 78.4 mL.
Vm - molar volume.
Mechanical waves need mediums. or else it isn't a mechanical wave