Answer:
A
Explanation:
Let's illustrate this; see the attachment.
We see that Mrs. Jacobson is pushing to the right with a force of 100 N and there is another opposite force pushing with a force of 15 N. Since these are in opposite directions, we can say that the force opposite to Mrs. Jacobson is pushing the fridge -15 N to the right (instead of 15 N to the left).
The net force would then be:
100 N + (-15 N) = 85 N to the right
The answer is A.
Answer:
85 N to the right
Explanation:
Convention: rightwards positive
Force applied by Mrs. Jacobson:
+100
Force applied by the fridge:
-15
Net force
+100 - 15
+85
why is water vapor important in weather
The electronegativities of the two atoms play a part in determining what kind of bonds are formed. The main two types of chemical bonds are ionic and covalent. Covalent bonds are formed by atoms that share valence electrons and are most commonly formed between nonmetal atoms.
Their valance electrons are redistributed in ways that make the atoms more stable.
Using, the table given above, one can conclude that, IT IS NOT ALWAYS POSSIBLE TO IDENTIFY A SUBSTANCE AS A COMPOUND, MIXTURE, PURE SUBSTANCE OR AN ELEMENT JUST BY LOOKING AT THEM.
Looking at the table, you will observe that, some of the substances listed under mixtures are actually compounds. That is, combination of hydrogen and oxygen will form water, which is a compound. Also, combination of sodium and chlorine will form sodium chloride, which is a compound.
period?
Answer:
The nuclear charge increases, but the number of inner shielding electrons stays the same.
Explanation:
Their shielding does not change, so the effective nuclear charge — the charge felt by a valence electron — increases.
The valence electrons are pulled closer to the nucleus, decreasing the atomic radius.
For example, consider the elements of Period 3.
The number of protons increases as you go from one element to the next, but the number of inner electrons is constant.