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The waste material left behind after the desired mineral is removed from ore rock is called the

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  1. Aristotle believed that the planets move around the Sun in elliptical orbits.

     

     

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  1. Aristotle believed that everything on Earth is made of one of only four types of material: earth, air, water, or fire.

     

     

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  1. Acid mine drainage contains sulfuric acid, which can kill or harm wildlife.

     

     

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  1. Collapsing underground mines can fracture natural gas pipelines.

     

     

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  1. A pulsar is a type of __________ that rotates very rapidly and emits electromagnetic radiation.

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Anatomy & physiology Science Assignment Help

1.Identify these as Acidic, Neutral or base



a. ph=7        .

b. pure water         .

c. vinegar         .

d. blood         .



 

2. Name the two subatomic particles not involved in chemical
bonding?

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anatomy & physiology Science Assignment Help

1. A reaction that can go both forwards and backwards is a      reaction



2.is salt in sea water a solvent or solute?

3.is ions like potassium in your blood solute or solvent?

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If a $10 investment is worth $30 today, how long ago must that $10 have been invested at 9% interest Mathematics Assignment Help

If a $10 investment is worth $30 today, how long ago must that $10 have been invested at 9% interest computed twice a year?

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  1. Which statement is true about black dwarfs?

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Answer the following……. Science Assignment Help