query: Why do balloons get cold when they deflate?
positive_passages.docid: 19450
positive_passages.text: Rubber band stretched produces heat and when released absorbs heat.. Why?
negative_passages.docid: 120596
negative_passages.text: Do atmospheric physics prevent hot air balloons from ascending over 60,000ft?
negative_passages.docid: 1977
negative_passages.text: Why are there holes in the icing?
negative_passages.docid: 74923
negative_passages.text: Why did the Earth cool down?
negative_passages.docid: 118861
negative_passages.text: Does an object need fluid under it to float?
negative_passages.docid: 8193
negative_passages.text: why shrinkwrap making the tube flat
negative_passages.docid: 48552
negative_passages.text: Why aren't solenoid/electromagnet windings insulated?
negative_passages.docid: 117433
negative_passages.text: Why do hydraulic jumps form?
negative_passages.docid: 82082
negative_passages.text: The velocity of the flowing coming out of the balloons?
negative_passages.docid: 18123
negative_passages.text: Need of the cold body in heat engine
negative_passages.docid: 126222
negative_passages.text: Why does air remain a mixture?
negative_passages.docid: 70709
negative_passages.text: Why is cold fusion considered bogus?
negative_passages.docid: 4215
negative_passages.text: Why are high white balance temperatures redder when warmer objects are bluer?
negative_passages.docid: 143010
negative_passages.text: Atmospheric pressure In FBD doubt
negative_passages.docid: 54247
negative_passages.text: Why does separating plastic from a cough drop create flashes?
negative_passages.docid: 142289
negative_passages.text: How can wind feel colder than normal air if it has more energy?
negative_passages.docid: 42478
negative_passages.text: Does "turning down the air conditioning" make it warmer or colder?