Mathematics, 10.08.2021 19:40, loveniasummer71
Hot air is less dense than cool air, so hot air will rise above cool air. Increasing the air
temperature inside a hot air balloon makes it lighter than the surrounding air, so the
balloon can lift up. The density of hot air is about 0.25 kg per cubic meter less than
that of cool air, which means a cubic meter of hot air can lift about 0.25 kg. What is
the minimum volume of hot air (in cubic meters) needed to lift a hot air balloon,
which weighs 375 kg and is carrying 3 people who weigh at least 68 kilograms each?
Enter the number only.
Answers: 1
Mathematics, 21.06.2019 17:00, heysonic91
The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?
Answers: 1
Mathematics, 21.06.2019 18:30, 25jzaldivar
Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made
Answers: 2
Mathematics, 21.06.2019 20:00, duhitzmay4693
The scatterplot below shows the number of hours that students read weekly and the number of hours that they spend on chores weekly. which statement about the scatterplot is true?
Answers: 2
Hot air is less dense than cool air, so hot air will rise above cool air. Increasing the air
temper...
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