Which of the following proved that the de broglie’s equation was correct?
A) Einstein theory...
Physics, 31.03.2020 18:18 coolcatbergmann
Which of the following proved that the de broglie’s equation was correct?
A) Einstein theory of relativity B) Planck’s equation
C) quantum mechanics
D) Davisson-Germer experiment
Answers: 1
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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 archimedes’ 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
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You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?
Answers: 1
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