Answer:
im pretty sure its b. sand and iron
ik that magnetism easily separates iron
Answer:
C. Hair dryer
Explanation:
Alternating Current
The other kind of electricity is called alternating current, or AC. Power plants produce this
type of electricity. It is carried by large power lines from the plant to your home. When you
plug a TV, a lamp, or a hair dryer into the wall socket, you are using this type of electricity.
Chemical reaction: C + O₂ → CO₂.
Law of conservation of mass <span>states that for any </span>system closed<span> to all transfers of </span>matter<span> and </span>energy<span>, the </span>mass<span> of the system must remain constant over time.
</span><span>In </span>chemical reactions<span>, the mass of the chemical components before the reaction (in this reaction carbon and oxygen) is equal to the mass of the components after the reaction (carbon dioxide).
</span>If we use one mole of substances, that:
mass of reactants is: 12 g (C) + 2·16 g (O) = 44 g.
mass of product is: 12 g + 32 g = 44 g.
Due to the law of conservation of energy we know that the energy that heated the surrounding had to have come from the reaction which means that the wood (with oxygen since this is combustion) lost 12000J. The change in energy for the wood is negative. I hope this helps. Let me know if anything is unclear.
