Chapter 15: Energy - Review and Practice | Baamboozle - Baamboozle

Summarize the change in both wavelength and energy as you move from radio waves to gamma rays on the electromagnetic spectrum.

radio waves have long wavelength - therefore low frequency and low energy; gamma rays have short wavelengths - therefore high frequency and high energy

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Using the image, describe at which end of the visible spectrum would you place RED? Which end would you place VIOLET?

RED - at the 'low energy end' of the visible spectrum (just after 'infraRED' and VIOLET - at the 'high end' of the visible spectrum (just before 'ultraVIOLET')

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An example of conversion of gravitational potential energy into kinetic energy is ____.

a falling raindrop

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From what height would a 10 kg rock fall from if it had a gravitational potential energy is 18000 J.

PE = m•g•h , so: m = PE/m•g = 183 m

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banana

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gift

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rocket

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baam

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A small 30 kg canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?

KE = ½mv² = 60 J

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Mechanical energy is _________.

the sum of the kinetic and potential energy of an object

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The visible light spectrum ranges between ________.

infrared and ultraviolet

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An example of an object having elastic potential energy is _______.

a stretched spring

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banana

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star

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gift

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banana

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An example of electromagnetic energy is ______

sunlight

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What color is the object in the image? How do you know?

Green - it is the only color reflected (not absorbed) by the object.

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The electromagnetic waves with the highest frequency are _____.

gamma rays

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lifesaver

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gift

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fairy

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thief

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Infrared rays have shorter wavelength than ______.

radio waves

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A 4 kg cat is resting on top of a bookshelf that is 2 m high. What is the cat's gravitational potential energy relative to the floor?

PE = m•g•h = 78.4 J

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