A project is located in an area with a demand-response program and on a site that has enough room for a wind-turbine to allow fo
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Answer:
It is a weighted average of the masses of an element’s isotopes.
Explanation:
The best definition of the atom mass of an element is that it is a weighted average of the masses of an element's isotopes.
- Isotopes of an element have the same electronic configuration but differ in only their masses.
- The atomic mass of an element can be derived from the geonormal abundances of this isotopes.
- It is the average of all the isotopes of an element.
Atomic mass = ∑m a
where m is the mass of the isotope i
a is the abundance of the isotope i
Answer:
, downward
Explanation:
There is only one force acting on the ball during its motion: the force of gravity, which is given by
where
m is the mass of the ball
is the acceleration of gravity (downward)
According to Newton's second law,
where F is the net force on the object and a is its acceleration. Rearranging for a,
As we said, the only force acting on the ball is gravity, so F = mg and the acceleration of the ball is:
Therefore, the ball has a constant acceleration of downward for the entire motion.