Answer:
See explanation
Explanation:
To find out the electronic structure of each element, you must know the number of electrons it contains.
If you find that out(the number of electrons in the neutral atom of an element is the same as its atomic number). Then you arrange those electrons in such a way that the first shell has only two electrons and subsequent shells have eight electrons.
Look up the groups to which the elements belong in the periodic table All the elements are in group 1 so the last shell must have only one electron.
Answer:
B
Explanation:
B is the most likely region that contains alkaline earth family elements.
Answer:
Explanation:
It is given that the ball is lodged in a hole in the floor of merry-go-round that is running at a constant speed.
Now the ball is moving a vertical circular motion
The position of the ball changes w.r.t to the center as it moves in a circular path i.e. vectorially it changes but its magnitude will remain the same.
The velocity of the ball is the same as merry-go-round so its magnitude remains the same but its direction will change continuously.
As the ball is moving in a circular path so a centripetal acceleration will acts towards the center so its value will be continuously changing.
Answer:
≈ 20.35 N [newton's of tension]
Explanation:
( (2.9 × 9.8) ÷ cos(35.6°) ) × sin (35.6°) =
( (28.42) ÷ (≈0.813) ) × (≈0.582) =
(≈34.96) × (≈0.582) = 20.3449446.... ≈ 20.35
Answer:
speed of light in glass ≈ 1.89*
Explanation:
refractive index (n) =
.......................equation 1
refractive index (n) = velocity of light in air/ velocity of light in medium ....equ2
equate equation 1 and two;
speed of light in glass = c*sinC
=
°
speed of light in glass = 188,796,117.314 m/s
speed of light in glass ≈ 1.89*
