Physics, 17.02.2022 09:30, alexismarie4881
An opera singer breaks a crystal glass with her voice. Which best explains why this occurs? The pitch of her voice matches the pitch of the glass. The amplitude of her voice heats the glass until it breaks. The intensity of her voice produces a standing wave in the glass. The frequency of her voice matches the natural frequency of the glass.
Answers: 3
Physics, 22.06.2019 00:30, powberier6979
Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedesā principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.
Answers: 2
Physics, 22.06.2019 06:10, crystalryan3797
Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70āc. calculate the work (in kj) done during this process.
Answers: 3
An opera singer breaks a crystal glass with her voice. Which best explains why this occurs? The pitc...
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