One source emits a spherical sound wave uniformly in all directions. a second source emits a hemispherical sound wave, uniformly over all directions only in front of the source. both sources produce same total power. what is the ratio of intensity at some distance from the first source to that at twice that distance in front of second source?
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Physics, 22.06.2019 04:40
Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely
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Physics, 22.06.2019 09:30
On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( ρ= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?
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Physics, 22.06.2019 15:30
What is a subatomic particle with a negative charge and very little mass?
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One source emits a spherical sound wave uniformly in all directions. a second source emits a hemisph...
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