Problem 6: BalloonA small balloon is a sphere of the radius 20 cm, and it is filled with the helium gas (monoatomic) atatmospheric pressurep= 100 kPa and a temperature 15◦C. Once we release the balloon it rises rapidlyto an altitude at which the atmospheric pressure drops by 20 %. At that point the balloon breaks. Consider that there is no heat exchange during the process. a) What was the radius of the balloon before it broke?a) What was the temperature at that altitude? Consider the outside temperature was the same asthe temperature inside the balloon.

An alligator swims to the left with a constant velocity of 5 \,\dfrac{\text{m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction. when the alligator sees a bird straight ahead, the alligator speeds up with a constant acceleration of 3 \,\dfrac{\text {m}}{\text s^2}3 s 2 m ? 3, space, start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction leftward until it reaches a final velocity of 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction leftward. how many seconds does it take the alligator to speed up from 5 \,\dfrac{\text {m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction to 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction?

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?