The number of protons in an atom is the same as its atomic number, which is found on its corresponding atomic symbol in the periodic table of elements. And as long as this atom has a neutral charge, than the number of electrons will be the same. If the atom does have a charge, like say, 2-, then subtract 2 from the number of protons to get the number of electrons.
For the number of neutrons, you have to memorize the isotopes available sometimes. But usually something like carbon 14 will have a total of (in this case) 14 total protons/neutrons. So subtract this number by the number of protons(6), and you have 8 neutrons.
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Answer:
A. 20 m/s north
Explanation:
The velocity of the car can be calculated as:
where
d is the displacement
t is the time interval
Taking north as positive direction, the initial position of the car is
(south)
while the final position is
(north)
So, the displacement is
(north)
The time interval for the motion is
t = 15 s
So, the velocity of the car is
(north)
The gravity on the moon is different than on earth.
Answers:
a)
b)
c)
Explanation:
A unit vector is a vector whose magnitude (length) is equal to 1. This kind of vector is identified as and the way to calculate is as follows:
Where:
is the vector
is the magnitude of the vector
Having this information clarified, let's begin with the answers:
a) Force Vector
Magnitude of :
<u />
<u>Unit vector:</u>
b) Displacement Vector
Magnitude of :
<u />
<u>Unit vector:</u>
c) Velocity Vector
Magnitude of :
<u />
<u>Unit vector:</u>
Answer:
Solar Nebula
Explanation:
~About 4.6 billion years ago, the sun and planets formed together from a cloud of dust and gas in which was called the solar nebula.~
~The cloud surrounded the sun in a crust and then it broke apart, according to theory.~
Hope this Helps!