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murzikaleks [220]
3 years ago
5

A girl stands on a bathroom scale. In metric units, the scale indicates that her weight is 42

Chemistry
1 answer:
gogolik [260]3 years ago
7 0

Explanation:

The scale is pushing back up against her feet with the same amount of force but in negative direction.

This can be explain using Newton's third law of motion which states that "action and reaction are equal and opposite".

As the girl weight pulls down on the scale in a positive way with a force of 42N, the scale pulls back with an equal amount of force upward in another direction.

The net force here is zero this is why the scale is not damaged by her weight.

Learn more:

Force brainly.com/question/12978926

#learnwithBrainly

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which question?

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Which classification best describes oxygen gas? a element b compound c solution d heterogeneous mixture
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oxygen is an element because it is a pure substance which cannot be split into simpler substances by chemical means

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A reaction between an acid and a base produced lithium chloride (LiCl). What acid and base combination could produce this salt?
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sergey [27]

The  moles of O2 are needed to react completely with 1.00 mol of C₂H₂ is 5 mol , 0.23  moles of C₂H₂ are needed to form 0.46 mol of CO₂ .

<h3>What is a Balanced Reaction ?</h3>

A balanced reaction is a reaction in which the number of atoms present in the reactants is equal to the number of atoms in the products.

It is given in the question that

the combustion of Acetylene is given by

2 H―C≡C―H + 5 O₂ → 4 CO₂ + 2 H₂O

Given moles of Acetylene = 1 mol

Moles of oxygen needed = 5 mol

as the mole fraction of Acetylene to Oxygen is 1 :5

The mole of Acetylene needed to form 0.46 mol of CO₂ is ?

mole fraction of CO₂ to Acetylene is 4:2

Therefore 0.23 moles of CO₂ is required.

To know more about Balanced Reaction

brainly.com/question/14280002

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5 0
2 years ago
A loaded coal wagon with a total mass of 20 000 kg is pushed by a force of 300 000 N. What was the wagon’s acceleration?
AlexFokin [52]

Answer:

<h2>15 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a =  \frac{300000}{20000}  =  \frac{30}{2}  \\

We have the final answer as

<h3>15 m/s²</h3>

Hope this helps you

5 0
3 years ago
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