Buoyancy: A hot air balloon along with its cargo has a mass of 4.0 × 105 kg, and it holds 7.0 × 105 m3 of hot air. It is floating at a constant height in air with a density of 1.29 kg/m3. What is the density of the hot air in the balloon?
A. 1.4 kg/m3
B. 0.72 kg/m3
C. 0.57 kg/m3
D. 0.86 kg/m3
E. 0.43 kg/m3
Answer: B
Physics & Space Science
You might also like to view...
If the Earth's period of rotation doubled, but the period of revolution stayed the same
a. the night would be twice as long. b. the night would be half as long. c. the year would be half as long. d. the year would be twice as long. e. the length of the day would be unchanged
Physics & Space Science
Objects used to map spiral arms are called spiral _______________
Fill in the blank(s) with correct word
Physics & Space Science
List considerations when editing video files for the web.
What will be an ideal response?
Physics & Space Science
Careful studies of Earth’s magnetic field for the past 330 million years shows that it has _____________ many times.
Fill in the blank(s) with appropriate word (s)..
Physics & Space Science