The number of protons in an atom is the atom's atomic number.
In a neutral atom the number of protons is equal to the number of electrons.
There is possibility of losing the electrons, but the number of protons are not loosed, except in nuclear chemistry.
So the number of protons is equal to the atom's atomic number.
A common could be the light and heat produced by the candles, and possibly the scent. I'm not completely sure.
Answer: The friction force.
Justification:
Since the box is sliding over the table, the normal force equals the weight of the object (and any other vertical force that is applied on the box).
So, the normal force and weight (along with any other vertical component of a force applied on the box) must be 10 N and 10 N.
The other two forces: 14 N and 7 N are the forces in the plane of the table and should be opposite in a same line. The 14 N force is the responsible of the motion and the 7N force is opposing the 14 N force, so the 7N force has to be the friction force. Of course, 14N - 7N > 0 which is why the box is moving.
Answer:
As the temperature of a sample of gas falls from 45.0ºC to 30.0ºC, its pressure falls to 300.
Explanation:
