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 Fender Tube assortment US $35.00 
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 Semicon - CR 275 - Tube US $3.99
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 ITT - 6DR7 - Tubes - Matching Code - Black Plates US $3.99
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 JAN-CHS-6SN7W Tube by Sylvania ! Unused in Box ! Tests Exlnt ! US $224.99
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 Realistic - 6FQ7 - 6CG7 - Tubes - Matching Code US $3.99
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 GE - 12AU7 - ECC83 - Tube US $3.99
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 Mullard - 5651 - Tubes US $3.99
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 GE - 12AX7 - 7025 - Tube - US $3.99
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 Raytheon - JRP- 12AT7 - Strong US $3.99
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 GE - 6J6 A - Tubes US $3.99
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 Realistic - 12AU7 - ECC82 Tube - Gold or Brass Pins US $3.99
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 RCA - 6GK6 - Tube US $3.99
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 WESTERN ELECTRIC Model 124A Rectifier Vacuum Tube US $9.99
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 5563A RCA Thyratron Tube NOS #4746 US $289.99
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 Vintage Motorola 65 83382D02 250 W Tetrode Stereo Tube US $42.99
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 Amperex 6BQ5 / EL84 tubes US $99.00
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All you Chemistry guys, I need your help.?
Identify each of the following changes as either physical or chemical, breifly explain each choice.
1) an iron nail rusts
2)a test tube shatters upon heating
3)a pile of papers is shredded in a paper shredder
4)a silver fork loses its luster after sitting unused in a kitchen drawer.
1) rusting is always a CHEMICAL change. The air reacts with elements in the metal, a redox reaction.
2) Physical change. Nothing is chemically altered only glass is broken.
3) Physical change, again no CHEMICAL REACTION takes place; therefore, this is a physical change.
4.) Chemical change. Just like with rust, the air has reacted with the outside coating of the fork.
Hope this helps!
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PRO- SYS CAULKING TUBE CAPPER - UNUSED
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