Imagine a ringing bell set inside a sealed glass jar. once all the air is removed and a vacuum is crated, the ringing sound is no longer heard. explain why this happens. a. the lack of air in the jar causes the ringing to stop. b. without air, the sound waves cannot travel to the ear. c. the glass prevents any sound from scraping. d. the pressure of outside air causes the sound to remain within the jar.
Answers: 1
Physics, 21.06.2019 22:30
The law of conservation of energy states that energy cannot be created or , energy can be from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '
Answers: 1
Physics, 22.06.2019 12:00
You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?
Answers: 2
Physics, 22.06.2019 16:40
The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
Answers: 3
Imagine a ringing bell set inside a sealed glass jar. once all the air is removed and a vacuum is cr...
History, 05.05.2020 11:21
Mathematics, 05.05.2020 11:21
Physics, 05.05.2020 11:21
English, 05.05.2020 11:21
Social Studies, 05.05.2020 11:21
Mathematics, 05.05.2020 11:21
Mathematics, 05.05.2020 11:21
Chemistry, 05.05.2020 11:21
Mathematics, 05.05.2020 11:21
History, 05.05.2020 11:21
Mathematics, 05.05.2020 11:21