Answer:
- <u>The electronic geometry of the different compounds:</u>
The over all geometry or structure of the compound is greatly effected by the number of lone pair electrons on its central atom, as there are a number of free or non- bonding electrons present inside the structure of the compound that effects the over all structure of the compound.
Explanation:
A- SO₂ and BF₃ has 3 lone pair of electrons and it has a trigonal planer geometrical shape, due to the presence of the 3 different regions or points of electronic density on its central atom.
B-NH₃ and CH₄ have the four different zones or regions due to having the very concrete or strong electronic density on its central atom. As, the shape of the molecules itself tends to be more tetrahedral in its geometric form or shape.
C- PCL₅ and PF₅ are the two compounds having the 5 different regions of electronic density. As, the over all geometric shape or structure of the compound is more trigonal Bi-pyramidal in total, as there are the lone pair of electrons on the central atom which makes the whole structure of the compound.
I believe the first one is true because a transverse wave generally looks like a right angle. The second one is also true. May I ask what Physics class you are taking, regular, honors, AP Physics 1, AP Physics 2? Also how close are you to finishing it?
Answer:
(a) K.E = 56000 J = 56 KJ, (b) d = 116.618 m
Explanation:
Given:
m = 70 Kg, Vi = 40.0 m/s, Vf= 0 m/s, μk = 0.70
Solution:
(a) K.E. =? J (due to motion of the runner the mechanical energy loss is in the form K.E.)
K.E. = 1/2 m v² = 0.5 ×70 kg × (40.0 m/s)²
K.E = 56000 J = 56 KJ
(b) distance d =? m
W= F × d
∴W = K. E = 56000 J and F= mg μk
K.E. = mg μk × d
so 56000 J = 70 kg × 9.8 m/s² × 0.70 × d
d = 116.618 m
Answer:
B. Studies showing that accidents have increased
Explanation:
With respect to the highway code, the use of cell phones while driving is prohibited. Though some drivers disobeys this rule of the code which causes division of concentration or distraction of the driver on the conditions and signals on the road. The distraction of the driver may cause the occurrence of an accident.
The banning of the use of cell phones by some states could be because accident rate has increased due to that.