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Tatiana [17]
3 years ago
11

Maria and Miquel were enjoying the fireworks when they got into a chemistry argument. Maria insisted that the fireworks were the

result of a chemical reaction. Miguel disagreed. What would you tell them to solve this argument? A) It is a change of state, solid to gas, due to the addition of energy. B) It was a physical reaction since the fuse was lit and heat was produced. C) The color changes and the release of energy indicate a chemical reaction. D) It is an endothermic reaction because energy was added; therefore it is a chemical reaction, Eliminate
Physics
2 answers:
mart [117]3 years ago
8 0

the answer is C, The color changes and the release of energy indicate a chemical reaction. hope that helps, :)

Tcecarenko [31]3 years ago
5 0
In this case, there is a chemical reaction where there is the burning of fuels that can vary between some within the periodic table, but when the fuel is burned a reaction occurs that gives the coloration the explosions of the fires.
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A skier starts from rest at the top of a hill that is inclined 10.5° with respect to the horizontal. The hillside is 200 m long,
Svetlanka [38]

Answer:

d) 289.31 m

Explanation:

Energy provided by potential energy = mgh = m x 9.8x 200 sin10.5 = 357.18m

Energy used by friction = μmgcos 10.5 x 200 = .075 x m x 9.8 x cos 10.5 x200 = 144.54 m .

Energy used by friction on plain surface = μmg x d.( dis distance covered on plain ) =.075x m x 9.8 xd = .735 m d

To equate

357.18 m -144.54 m = .735 m d

d = 289.31 m .

4 0
3 years ago
One day on her walk home from school, Leann noticed some rust on an old car Leann knows that when iron and oxygen chemically rea
Katena32 [7]

Answer:

reactants

Explanation:

The reaction model is given as shown below:

                            4Fe   +   3O₂   →   2Fe₂O₃

The name that describes the iron and oxygen found on the left hand side of Leann's model is reactants.

Reactants in a chemical expression are the species that are combining together to give a product.

Some reactions only have one reactant and such a chemical process is often termed decomposition reaction.

The two moles of Fe₂O₃ is the product of the reaction.

4 0
3 years ago
Why cooking pots are provided with wooden or plastic handles
Lelechka [254]
Metal cooking pots and pans often have wooden handles. Wood has a higher specific heat than metal, so it takes more energy to heat a wooden handle than a metal handle. As a result, a wooden handle would heat up more slowly and be less likely to burn your hand when you touch it.
7 0
3 years ago
Two coils connected in series have a resistance of 36 ohm and when connected in parallel have a resistance of 8ohm. Find resista
nadezda [96]

Answer:

Explanation:

Remark

Two resistances in series has the form of

Rs= C1 + C2

Two resistances is parallel has the form of

Rp = (C1 *C2)/(C1 + C2)

The plan is to first of all find C1*C2 and use this information and C1 + C2 to find the individual resistances.

Givens

Rs = 36 ohms

Rp = 8 ohms

Solution

Rp = C1 * C2/(C1 + C2)

Rp = 8 ohms

C1 + C2 = 36 ohms

8 =    C1*C2 / 36                          Multiply by 36

8* 36 = C1*C2

C1*C2 = 288

Use Rs to solve for C1

  • C1 + C2 = 36
  • C1 = 36 - C2

(36 - C2) * C2 = 288

36*C2 - C2^2 =288                    Multiply by - 1

-36C2 + C2^2 = -288                 Add 288 to both sides

C2^2 - 36C2 + 288= 0               Factor this equation

(C2 - 12)(C2 - 24)

C2 - 12 = 0

C2 = 12

C2 - 24 = 0

C2 = 24

<em> </em>

C2 = 24 or

C2 = 12

C1 = 36 - C2

C1 = 36 - 24 = 12

C1 = 36 - 12  = 24

Answer

<u><em>C1 = 12 ohms or 24 ohms</em></u>

<u><em>C2 = 24 ohms or 12 ohms</em></u>

7 0
3 years ago
an object accelerates from rest to a speed of 24m/s over a distance of 56 m. what acceleration did it experience
slamgirl [31]
Probably need to do research on acceleration and experience
5 0
3 years ago
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