Answers: 1
Physics, 22.06.2019 00:30
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
Physics, 22.06.2019 07:10
Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers
Answers: 1
Physics, 22.06.2019 23:30
Sound travels slower in colder air that it does in warmer air. make a claim about the effect of air temperature on the speed of sound. support your claim with evidence
Answers: 3
q= most of the energy used to boil a kettle of water comes from fossil fuels .. true or false ?
Mathematics, 02.12.2020 07:20
History, 02.12.2020 07:20
Computers and Technology, 02.12.2020 07:20
Social Studies, 02.12.2020 07:20
Mathematics, 02.12.2020 07:20
Mathematics, 02.12.2020 07:20
History, 02.12.2020 07:20
Mathematics, 02.12.2020 07:20
History, 02.12.2020 07:20
Mathematics, 02.12.2020 07:20
Mathematics, 02.12.2020 07:20
Mathematics, 02.12.2020 07:20
Spanish, 02.12.2020 07:20