Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

tnhuy

The mass of hot-air balloon and its occupants is 320 kg (excluding the hot air inside the balloon). The air outside the balloon has a pressure of 1.01x10^5 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 650 m3. The pressure of the heated air remains the same as that of the outside air. To what temperature (in K) must the air be heated so that the balloon just lift off? The molecular mass of the air is 29u

  • one year ago
  • one year ago

  • This Question is Open
  1. Shadowys
    Best Response
    You've already chosen the best response.
    Medals 0

    note: for buoyant force to act, the density of the heated air must be lesser than the air outside of it. do you need further help?

    • one year ago
  2. tnhuy
    Best Response
    You've already chosen the best response.
    Medals 0

    i need more detail, such as equation, how to calculate, because i'm not good at physic. this is my assignment, i want to get high bonus score in final test. if you can give me completed solution, i will thank you very much.

    • one year ago
  3. Shadowys
    Best Response
    You've already chosen the best response.
    Medals 0

    ah, if it's an assignment, i'll just give you the eqs. \(\Sigma F= F_B- F_G=0\) since this is the bottom line before it lifts off. \(F_B = \rho V g= (M_human+m_{heatedair})g\) \(V=\frac{m}{\rho}\), so you have to get the mass of the air inside the balloon.

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.