Star formation begins in molecular clouds. These environments are favorable for star formation because of their. These conditions allow clumps to collapse into protostars because can overcome Throughout the process of collapse, the interior temperature increases. Eventually, the rate of contraction slows because fights to overcome in the now-hot interior. The main sequence star now maintains a balance between gravity and pressure, a state called. This overall process is the same for all stars, but it happens most quickly for.

In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door

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.

Where do magnetic lines of force enter earth?