Answer:
The first option
Explanation:
Groundwater flows faster where the hydraulic gradient and/or hydraulic conductivity are larger. Groundwater flow velocities are much slower than surface water flow velocities, except in limestone karst formations, where groundwater flows through caves and large solution channels.
Answer:
18 is the nuclesus, 20 is the smooth endoplasmic reticulum and 21 is the golgi apparatus and 19 is the microtubes and 17 is the vacules.
Explanation:
Answer : The correct option is, (1) an atom with 20 protons, 21 neutrons, and 20 electrons.
Explanation :
Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.
Atomic number is defined as the number of protons or number of electrons.
Atomic number of = number of protons = number of electrons
Mass number is defined as the sum of number of protons and number of neutrons.
Number of neutrons = Mass number - Number of protons
As we are given,
Element = Calcium
Number of protons = 20
Number of electrons = 20
Number of neutrons = 20
For the isotope of calcium, the element should have the same number of protons but the different number of neutrons of each of the atom.
From this we conclude that, the option (1) would be an isotope of calcium because in this the protons and electrons are same but neutrons are different.
Hence, the correct option is, (1) an atom with 20 protons, 21 neutrons, and 20 electrons.
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I think both Meg and Rachel applied the same force because the speed was the same