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kogti [31]
3 years ago
9

What forces makes a fan stop spinning?

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

Answer:

And since there is a frictional force acting upon the rotating blades of the fan due to the air, the speed of the fan blades ceases and ultimately comes to halt. Thus here, air friction is the external force which makes the fan blades to stop after sometime, otherwise it would have never stopped rotating :P.

Explanation:

butalik [34]3 years ago
5 0

Answer: air friction

Explanation:

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What is the chemical name for the balanced equation? 2Al+3Pb(NO3)2=2Al(NO3)3+3Pb​
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  • The chemical name for reactant side:

                  Al - Aluminium, Pb(NO3)2 -  Lead(II) nitrate.

  • The chemical name for product side:

                  Al(NO3)3 - Aluminium nitrate, Pb - lead.

<u>Explanation</u>:

  • This is an oxidation-reduction (redox) reaction:

                       3 Pb^{II} + 6 e- → 3 Pb^{o} (reduction)

                       2 Al^{o} - 6 e- → 2 Al^{III} (oxidation)

Pb(NO3)2 is an oxidizing agent, Al is a reducing agent.

  • Reactants:                              

                                    Al uminium

              Names: Aluminum, Aluminium powder,  Al

              Appearance: Silvery-white-to-grey powder, Silvery-white,  

                                      malleable, ductile, odorless metal.

                             Pb(NO3)2 – Lead(II) nitrate

              Other names: Lead nitrate, Plumbous nitrate, Lead dinitrate

              Appearance: White colorless crystals,  White or colorless crystals

  • Products:

                            Al(NO3)3 – Aluminium nitrate

              Other names: Nitric Aluminum salt, Aluminum nitrate,

                                       Aluminium(III) nitrate

              Appearance: White crystals, solid | hygroscopic

                                   Pb  - lead

              Names: Lead, Lead metal, Plumbum

              Appearance: Bluish-white or silvery-grey solid in various forms.

                                     Turns tarnished on exposure to air. A heavy, ductile,

                                     soft, gray solid.

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