The best option is B) <span>7.0 × 10² newtons.
</span>If Earth attracts a person with a gravitational force of <span><span>7.0 × 10² </span>newtons,
the person attracts Earth with a gravitational force of 7.0 × 10² newtons.</span>
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Square root of (4^2 + 4^2) = 4*squareRoot(2)
Answer:
c) Subduction of an oceanic plate under another oceanic plate, collision of two continental plates, subduction of an oceanic plate under a continental plate
Explanation:
Islands arcs are a product of subduction of an oceanic plate under another oceanic plate
Mountain ranges are a product of collision of two continental
plates,
Volcanic arcs are a product of subduction of an oceanic plate under a continental plate
The unknown metal with a mass of 39.27 g is potassium with the symbol K.
The mass of an atom is due to protons and neutrons present in it.
The protons and neutrons are together present in the nucleus of an atom.
The mass of any element is given by its mass number whose formula is
Mass Number = Number of protons + Number of neutrons
In the given case 39 = Number of protons + Number of neutrons
The only element of the periodic table which satisfies the above equation is potassium because it has 19 protons and 20 neutrons.
Thus, the unknown metal with a mass of 39.27 g is potassium with the symbol K.
To know more about "mass number", refer to the following link:
brainly.com/question/4408975?referrer=searchResults
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Ultraviolet rays.
The sun emits UV rays which reach the earth by radiation, heats the earth. The harmful rays are reflected back.
Hope it helped!
