Exploring the Science Behind Magnetism

What innovative solution did engineers use to break the 100-mile-per-hour barrier for the Superman rollercoaster?

• Solar panels

• Hydraulic systems

• Magnets and electromagnets

• Wind tunnels

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How do linear synchronous motors work on the Superman rollercoaster?

• By using hydraulic pressure

• By changing the polarity of electromagnets

• By using wind resistance

• By using solar energy

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What is a fundamental property of a magnet?

• It attracts all materials

• It attracts wood and plastic

• It attracts iron and similar metals

• It repels all materials

What happens to a nail when it is wrapped with copper wire and connected to a battery?

• It loses its magnetic properties

• It becomes an electromagnet

• It melts

• It becomes a permanent magnet

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What is the primary use of electromagnets in junkyards?

• To power vehicles

• To lift and move scrap metal

• To generate electricity

• To sort plastic materials

What was the first practical application of magnets discovered by the Chinese?

• Magnetic levitation

• Magnetic storage

• The compass

• Electric motors

Who first demonstrated that electric current produces a magnetic field?

• Isaac Newton

• William Gilbert

• Hans Christian Oersted

• Michael Faraday

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What are rare earth magnets commonly used in?

• Cell phones and laptops

• Textile industry

• Woodworking tools

• Glass manufacturing

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What is the potential benefit of magnetic random access memory (M RAM)?

• It is cheaper to produce

• It uses less electricity

• It is faster than traditional RAM

• It retains data even when the power is off

What is a unique property of plastic magnets?

• They are cheaper to produce

• They are stronger than metal magnets

• Their magnetism can be controlled with light

• They are not affected by temperature

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