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alexdok [17]
1 year ago
15

Sample Response: Forces are either positive or negative vectors, depending on the direction in which the force is acting. The ne

t force is the sum of all of the forces acting on an object. If the children pull on the toy with the same force in opposite directions, the forces will be perfectly balanced and cancel out, leaving a net force of zero.
What did you include in your response? Check all that apply.

Forces are vectors.
Forces can be positive or negative.
The forces exerted by the children are in balance.
The net force is the sum of all of the forces that canceled out to zero.
Chemistry
2 answers:
lianna [129]1 year ago
8 0

The net force is the sum of all of the forces that cancelled out to zero. Hence, option D is correct.

<h3>What is force?</h3>

The pushes or pulls on an object with mass causes it to change its velocity.

The net force is the vector sum of all forces acting on an object. Force is a vector quantity.

Two forces of equal magnitude when acting on an object in opposite directions will cancel out each other.

As a result net force is equal to 0. The word net here shows the total force acting on the object.

Hence, option D is correct.

Learn more about the force here:

brainly.com/question/14902131

#SPJ1

Varvara68 [4.7K]1 year ago
7 0

  • The net force is the sum of all of the forces that cancelled out to zero. Hence, option D is correct.

What is force?

  • The pushes or pulls on an object with mass causes it to change its velocity.

  • The net force is the vector sum of all forces acting on an object. Force is a vector quantity.

  • Two forces of equal magnitude when acting on an object in opposite directions will cancel out each other.

  • As a result net force is equal to 0. The word net here shows the total force acting on the object.

<u>Hence, option D is correct.</u>

<em><u>▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬</u></em>

<em><u /></em>

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In order to find molarity, you must first find the number of moles that was dissolved.

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3 years ago
A 0.187 M weak acid solution has a pH of 3.99. Find Ka for the acid. Express your answer using two significant figures.
Anna35 [415]

Answer:

5.56 × 10⁻⁸

Explanation:

Step 1: Given data

  • Concentration of the weak acid (Ca): 0.187 M
  • pH of the solution: 3.99

Step 2: Calculate the concentration of H⁺

We will use the following expression.

pH = -log [H⁺]

[H⁺] = antilog -pH = antilog -3.99 = 1.02 × 10⁻⁴ M

Step 3: Calculate the acid dissociation constant (Ka)

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