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adell [148]
3 years ago
12

Please help me vote you brainiest

Chemistry
2 answers:
Bas_tet [7]3 years ago
8 0

Explanation:

This scenario demonstrates the first law of motion because the coffee cup remained at rest and the moving of the car created the motion to make it fall. The car's an unbalanced force, so when it moves, the cup does to.

Simora [160]3 years ago
4 0
Its an example of newtons first law because if the car did not move, the cup would have never fell. The car and cup will stay in place unless something or someone moves the object at rest.
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Distinguish between mass and weight
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There is a basic difference, because mass is the actual amount of material contained in a body and is measured in kg, gm, etc. Whereas weight is the force exerted by the gravity on that object mg. Note that mass is independent of everything but weight is different on the earth, moon, etc.

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What type of reaction is represented here:<br> 2K + Ca(OH)2 → 2KOH+ Ca
Anton [14]

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5 0
3 years ago
Archeologist discovered a silver crown in an ancient tomb and sent it for analysis. You placed the crown in a tub of water and f
gulaghasi [49]

Answer:

Explanation:

The density of pure lead is 10.49g/cm³

Given parameters:

Volume of water displaced by the crown = 238.1ml

Mass of crown = 2.50kg

Solution

We would simply find the density of the discovered crown and compare with that of the standardized density of lead.

Density is an intensive property of matter and it is the same for any form of matter. It is amount of substance per unit volume:

               Density = \frac{mass}{volume}

We need to convert the given parameters to standard unit,

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         Therefore, the volume of water displaced is 238.1cm³

Also,

                       1kg  = 1000g

                       2.5kg = 2500g

    mass of the crown is 2500g

 

Density = \frac{2500}{238.1} = 10.49g/cm³

The crown is made of silver because the density matches with that of pure silver.

                       

8 0
3 years ago
State two essential conditions for rusting of iron. List two methods of protecting iron from rusting?​
gizmo_the_mogwai [7]
Conditions for rusting
• moisture
•oxygen

Prevention
•Painting
• Galvanisation
• Making Alloys
• greasing
Hope this helps you ;)(:

8 0
3 years ago
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