DA #3 Review

Look at the diagrams. Which diagram best illustrates transverse waves and why?

• Diagram A because the direction of vibration is the same as the direction of motion of the wave energy.

• Diagram B because the direction of vibration is the same as the direction of motion of the wave energy.

• Diagram A because the direction of vibration is perpendicular to the direction of motion of the wave energy.

• Diagram B because the direction of vibration is perpendicular to the direction of motion of the wave energy.

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Examine the diagram of a swinging pendulum. To start its swinging, the pendulum was pulled up to Position A and then released. At which position(s) is the pendulum’s kinetic energy at a minimum and its gravitational potential energy at a maximum?

• Positions A & E

• Positions B & C

• Positions E only

• Positions C only

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How can you describe the change in energy when a faster bumper car in an amusement park ride runs into a slower bumper car?

• Chemical energy transforms from one bumper car to another.

• Elastic potential energy transfers from one bumper car to another.

• Gravitational potential energy transforms from one bumper car to another.

• Kinetic energy transfers from one bumper car to another.

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The diagram shows how a sound wave transfers sound energy from place to place. Which type of wave is a sound wave?

• transverse wave

• longitudinal wave

• electromagnetic wave

• seismic wave

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Which is an example of energy being transferred by a longitudinal wave?

• A child shakes the free end of a skipping rope that is tied to a tree.

• A pebble falls in water and ripples travel along the surface.

• Two students hold a spring at either end, and one student shakes the end of the spring up and down.

• Two students hold a spring at either end, and one student pushes and pulls the spring back and forth.

Which is an example of energy being transferred by a wave?

• An electric current in a copper wire transfers energy to a toaster.

• Energy from a vibrating drumhead is transferred to the ear of a listener.

• To make it move, a rider transfers energy to a bicycle by pedaling.

• A child transfers energy to a pinwheel by blowing on it.

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Which area of the flashlight represents electrical energy?

• Electric Wires

• Light Bulb

• Batteries

Energy stored in foods is ____________; digested food releases ____________ energy for movement and ____________ energy as heat.

• chemical, mechanical, thermal
• radiant, thermal ,mechanical

• heat, mechanical, thermal

• mechanical, thermal, chemical

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The alignment of the Moon and Sun has an effect on Earth’s ocean tides. What force causes this effect?

• sun spots

• magnetic fields

• gravity

• air resistance

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Which of the following has the greatest effect on the Earth’s tides?

• The Moon’s gravitational pull

• The Sun’s gravitational pull

• The gravitational pull of Venus

• The gravitational pull of Mars

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