3 years ago

How many ternary strings of length 2 n are there in which the zeroes appear only in odd-numbered positions?

1 answer:

8 0

In a string of length $2n$ , there are exactly $n$ odd-numbered posiitons. In the remaning $n$ even-numbered positions, we want to choose from only two possible digits, either a 1 or a 2. This means there are $2^n$ such ternary strings.

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If a person pulls a cart to the right at 5N of force and another person pulls to the left with a 15N of force? What is the net f

zepelin [54]

Answer:

The net force is 10 [N] acting to the left

Explanation:

To solve this type of problem we must make a sum of the forces acting on the cart, since the forces are vectors, we know that vectors can be added, In this way forces that go in the same direction are added and forces in opposite directions are subtracted.

FL = force to the left = - 15 [N]

FR = force to the right = 5 [N]

FT = Resultant force [N]

- 15 + 5 = FT

FT = - 10 [N]

The negative sign tells us that the force acts to the left.

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3 years ago

What is the most important force in astronomy?

CaHeK987 [17]

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