The third force C is in the opposite direction of the sum of the first two forces, A+B, but the magnitude is the same as A+B
Since A & B are at right angles we can just use Pythagoras and trig:
A+B magnitude = sqrt(6^2 + 3^2) = 6.71
A+B angle = arctan(6/3) deg north of east = 63.4 deg (first quadrant)
So C magnitude = 6.71 (same as A+B)
[C angle = 63.4 deg south of west (third quadrant) = -180+63.4 deg polar = -116.6 deg
1. False
2. Positive
I’m just joking I don’t know the answersss
Answer:
The answer is B on khan academy
Explanation:
1) A negatively charged ion is chloride
2) Moving from left to right, valence electrons increase by one.
3) The period number gives information about how many energy levels it has
4) Fluorine has a charge of 1–
5) Potassium and iodine form an ionic bond
The periodic table is an arrangement of elements into groups and periods based on their periodic properties.
In the periodic table, elements are arranged in groups and periods. There are 18 groups and 8 periods.
Chlorine is in group 17, there have seven outermost electrons hence the chlorine atom needs only one more electron in order to attain a stable octet. This is done by accepting one electron to form the negatively charged chloride ion.
As we move from one period to another, one extra electron is added to the outermost shell of elements. Hence, the valence electrons increases by one.
The period to which an element belongs shows you the number of shells or energy levels in the atom of that element.
Fluorine is in group 17. One electron is needed to achieve a stable octet. When an atom accepts one electron, its charge is 1–.
Bonding based on ionic charges occurs between metals and nonmetals. Potassium is a metal of group 1 and iodine is a non metal of group 17 hence they can bond together based on their ionic charges.
Learn more:brainly.com/question/23277186
<span>If the refrigerator weights 1365 and you are not exerting any vertical force on it, then the normal force is also 1365N. so Fn=1365
Fsf = Static frictional force = (coefficient of static friction) * (Normal force)
So the least for you could exert to move it is equal to the Fsf.
Fsf = (0.49)(1365N)</span><span>
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