Answer : The correct option is, the number of electrons that fill the outer shell.
Explanation :
Element : It is a pure substance which is composed of atoms of similar elements.
The elements of similar characteristics have same number of valence electrons.
As we know that in the formation of compound the number of valence electrons participate in the bonding. So, the number of electrons that fill the outer shell determines the properties of elements.
Hence, the correct option is, the number of electrons that fill the outer shell.
If you are asking for the weight then the formula is F=mg where f is weight m is mass and g is acceleration due to gravity.m=52kg and g=9.8m/s2(the gravity of earth) F=52*9.8=509.6 therefore the weight of the object is 509.6N
1.) Velocity is in m/s, and acceleration is in m/s^2 like you said. Because of this, we can calculate this by dividing the speed by the time it took to get to that speed. (20 meters/second) / 10 seconds = 2 meters/ second^2
2.) Same thing with the first one. (100 meters/second) / 4 seconds = 25 meters / seconds^2
Given there are three blocks of masses , and (ref image in attachment)
When all three masses move together at an acceleration a, the force F is given by
F = ( + + ) *a ................(equation 1)
Also it is given that does not move with respect to , which gives tension T is exerted on pulley by only, Hence tension T is
T = *a ..........(equation 2)
There is also also tension exerted by . There are two components here: horizontal due to acceleration a and vertical component due to gravity g. Thus tension is given by
T = ................(equation 3)
From equation 2 and 3, we get
*a =
Squaring both sides we get
* = * (+)
* = ( * )+ ( *)
( - ) * = *
= */( - )
Taking square root on both sides, we get acceleration a
a = *g/()
Hence substituting the value of a in equation 1, we get
When light passes from a less dense to a more dense substance, (for example passing from air into water), the light is refracted (or bent) towards the normal. In your question the light is moving from rarer to denser medium