Mathematics, 01.06.2021 21:40 ctyrector
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: 2
Mathematics, 21.06.2019 16:30
A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.
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Mathematics, 21.06.2019 17:00
If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?
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Mathematics, 21.06.2019 17:00
How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.
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Hot air is less dense than cool air, so hot air will rise above cool air. Increasing the air
temper...
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