A 100 kg box is initially at rest on a level surface. One 10 N force acts on the box , directed toward the right. A second 10 N
1 answer:
Answer:
The box will not move because balanced forces are acting on it.
Explanation:
According to Newton's first law of motion, an object will remain in its state of rest or motion along a straight line unless acted upon by an unbalanced force.
An unbalanced force is an individual force acting on any side of an object which is not balanced by a force of equal magnitude acting in the opposite direction.
From the image, two forces of equal magnitude of 10 N are pulling the 100 kg box in opposite directions. Since the two forces, 10 N each are pulling the object in opposite directions, they are balanced forces. Therefore, the box will not move because balanced forces are acting on it.
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Answer:
C. Phosphorus (P)
Explanation:
Given;
Electron configuration
Firstly we have to find out the number of shell of given element. For this we have to add number of electron of each shell.
Here counting goes to 3 that means element have three shells. Now we find out number of electrons in each shell.
First shell of an element is K and it has only one sub shell that is 1s. In this element 1s contains only 2 electrons.
For 2nd shell that is L has two sub shell 2s and 2p, for this element 2s contains 2 electrons and 2p contains 6 electrons. That means total number of electrons for L shell is 8.
Now for 3rd shell that is M has two sub shell 3s and 3p, for this element 3s contains 2 electrons and 3p contains 3 electrons. That means total number of electrons for M shell is 5.
Now total number of electrons for the element is the sum of number of electrons in each shell.
Total number of electrons = 2+8+5=15
And we know the number of electrons of any neutral element is equal to the number of protons and number of protons gives us atomic number of the element.
So the atomic number of given element is 15 that is of Phosphorus.