Pz
a tuning fork with a frequency of 440 hz produces waves with a wavelength of 0.78 m at 20°...
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Physics, 22.06.2019 00:00
Which is not a characteristic of a heat pump? a. it is used in air conditioners. b. it uses a refrigerant. c. it requires no work. d. it reverses the normal flow of thermal energy.
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Physics, 22.06.2019 18:00
Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly
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Physics, 23.06.2019 16:30
Aperson driving a car applies the brakes. this produces friction, which stops the car. into which type of energy is the mechanical energy of the car converted? a. gravitational b. chemical c. light d. heat
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Physics, 23.06.2019 20:00
Which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. view available hint(s) which choice represents a pair of resonance structures? note that lone pairs have been omitted for clarity. o=n−f and n=o−f o=o and f−f n≡c− and n≡c−h o−n=o and o=n−o?
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