![subject](/tpl/images/cats/fizika.png)
Physics, 27.07.2019 18:40 ethanmatthews2336
What is the minimal mass of helium (density 0.18 kg/m3) needed to lift a balloon carrying two people in a basket, if the total mass of people, basket, and balloon (but not gas) is 300 kg ? the density of the air is 1.2 kg/m3?
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Physics
![image](/tpl/images/cats/fizika.png)
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:00, maren17
Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
Answers: 3
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:20, tylersabin72
Object a has a length of 3 cm, a width of 2 cm, and a height of 4 cm. object b is dropped into a graduated cylinder. it displaces 19 ml of water. the volume of object a is: a: greater than the volume of object b b: less than the volume of object b c: equal to the volume of object b
Answers: 2
![image](/tpl/images/cats/fizika.png)
Physics, 23.06.2019 03:30, diametriagay
Astudent pushes a 40-n block across the floor for a distance of 10 m. how much work was applied to move the block? a. 4 j b. 40 j c. 400 j d. 4000 j
Answers: 1
You know the right answer?
What is the minimal mass of helium (density 0.18 kg/m3) needed to lift a balloon carrying two people...
Questions in other subjects:
![Konu](/tpl/images/cats/health.png)
Health, 02.11.2020 01:00
![Konu](/tpl/images/cats/en.png)
English, 02.11.2020 01:00
![Konu](/tpl/images/cats/istoriya.png)
History, 02.11.2020 01:00
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/es.png)
![Konu](/tpl/images/cats/istoriya.png)
History, 02.11.2020 01:00
![Konu](/tpl/images/cats/istoriya.png)
History, 02.11.2020 01:00
![Konu](/tpl/images/cats/en.png)
English, 02.11.2020 01:00
![Konu](/tpl/images/cats/en.png)
English, 02.11.2020 01:00
![Konu](/tpl/images/cats/mat.png)
Mathematics, 02.11.2020 01:00