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22 Cards in this Set
- Front
- Back
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When a bar magnet is broken in two equal pieces
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each piece is half as strong as the original magnet
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The Doppler effect is characteristic of
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all kind of waves
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Red sunsets are due to red frequencies of light that survive being
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scattered in the air
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The natural frequency of an object depends on its
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elasticity, and size and shape
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The source of all wave motion is
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a vibrating object
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The sky is blue because
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air molecules in the sky act as tiny resonators that scatter blue light
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Current flows through
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a circuit
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In a longitudinal wave, the compressions and rarefactions travel
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same direction
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The electrical forces between charges depend on the
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magnitude of electric charges, and separation distance between electric charges
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Glass is transparent to light of wave frequencies that are
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below its natural frequencies
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Changing the magnetic field intensity in a closed loop of wires induces
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current, and voltage
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A wave barrier is produced when a wave source moves
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as fast as the waves it produces
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Food in a pressure cooker is cooked faster because of
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the higher temperature
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Steam burns are more damaging than burns caused by boiling water because
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steam has more energy per kilogram than boiling water, and gives up additional energy when it condenses
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Evaporation is a cooling process and condensation is a
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warming process
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An observer on the ground hears a sonic boom, which is created by an airplane flying at a speed
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greater than the speed of sound
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Glass is opaque to light with wave frequencies that
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match its natural frequencies
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A device that transforms electrical energy to mechanical energy is
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a motor
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The phenomenon of beats results from
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sound interference
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In science, an educated guess is a
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hypothesis
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Magnetic domains normally occur in
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iron
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Sound waves can interfere with one another so that
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no sound results
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