A helium-filled balloon has a volume of 1 m3 . As it rises in the earth's atmosphere, its volume expands. What will its new volume be (in m3) if its original temperature and pressure are 20C and 1 atm, and its final temperature and pressure are -40C and 0.1 atm?
a. 4
b. 6
c. 8
d. 10
e. 1.5
Question 2
A bicycle pump contains air at one atmosphere and 0C. As the tire is pumped up, the volume of air decreases by 50 with each stroke. What is the new pressure of air (in atm) in the chamber after the first stroke, assuming no temperature change?
a. 2
b. 1
c. 0.5
d. 0.1
e. 3
The Sun as it appears from the surface of Earth before sunset.
False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth.
Speed of Earth
The European Alps have lost ~30% to 40% of surface area and ~50% of volume since the 1850s.
Earth emits radiation back out to space from all surfaces, both day and night
The Last Man on Earth