Identify the isotope that has atoms with 117 neutrons 77 protons and 77 electrons
2 answers:
Explanation:
An isotope is defined as the specie which contains same number of protons but different number of neutrons.
Also, it is known that atomic number is the sum of only total number of protons present in an element. Whereas mass number is the sum of total number of both protons and neutrons present in an element.
Hence, atomic mass of the given atom will be as follows.
Atomic mass = no. of protons + no. of neutrons
= 77 + 117
= 194
According to the periodic table, platinum is the atom with atomic number 194.
Hence, we can conclude that isotope that has atoms with 117 neutrons 77 protons and 77 electrons is .
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Answer:
The answer is not correct.
Explanation:
Stu's answer is not correct, the equation to use is known as the law of ohm. In which the voltage is defined as the product of the current by the resistance, then we will see this equation.
In order to find resistance, this term is found multiplying the current on the right side of the equation, therefore the current will be divided on the left side of the equation.
That is the reason that the result found by Stu is not correct.
To solve this problem it is necessary to apply the concepts related to Newton's second law and the kinematic equations of movement description.
Newton's second law is defined as
Where,
m = mass
a = acceleration
From this equation we can figure the acceleration out, then
From the cinematic equations of motion we know that
Where,
Final velocity
Initial velocity
a = acceleration
x = displacement
There is not Final velocity and the acceleration is equal to the gravity, then
From the equation of motion where acceleration is equal to the velocity in function of time we have
Therefore the time required is 0.0705s