Physics, 10.09.2019 19:30 Killion2022
Suppose you're on a hot air balloon ride, carrying a buzzer that emits a sound of frequency f. if you accidentally drop the buzzer over the side while the balloon is rising at constant speed, what can you conclude about the sound you hear as the buzzer falls toward the ground?
(a) the frequency and intensity increase
(b) the frequency decrease and intensity increase
(c) the frequency decrease and intensity decrease
(d) the frequency remains the same, but the intensity decreases.
Answers: 1
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A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.
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Physics, 22.06.2019 09:00
Sobre transformações cÃclicas, são feitas algumas afirmações, determine quais estão corretas. i – a variação de energia interna em uma transformação cÃclica é nula; ii – o trabalho, em uma transformação cÃclica, é sempre positivo; iii – ao completar um ciclo, o gás tem a mesma temperatura com a qual começou a transformação; iv – uma transformação cÃclica é, obrigatoriamente, composta de transformações conhecidas, como adiabática, isocórica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
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Suppose you're on a hot air balloon ride, carrying a buzzer that emits a sound of frequency f. if yo...
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