Physics, 14.04.2020 19:43 jujusmith2022
The mass of a hot-air balloon and its occupants is 260 kg (excluding the hot air inside the balloon). The air outside the balloon has a pressure of 1.01 105 Pa and a density of 1.29 kg/m3. To lift off, the air inside the balloon is heated. The volume of the heated balloon is 600 m3. The pressure of the heated air remains the same as the pressure of the outside air. To what temperature (in Kelvins) must the air be heated so that the balloon just lifts off?
Answers: 2
Physics, 22.06.2019 05:20
A3.9 g aluminum foil ball with a charge of +4.1ร10โ9 c is suspended on a string in a uniform horizontal eโ field. the string deviates to the right and makes an angle of 30โ with the vertical. part a part complete what information about the eโ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of eโ only the direction of eโ both the magnitude and the direction of eโ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you
Answers: 3
Physics, 22.06.2019 16:00
The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.
Answers: 2
Physics, 22.06.2019 23:00
Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.
Answers: 1
The mass of a hot-air balloon and its occupants is 260 kg (excluding the hot air inside the balloon)...
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