Mathematics, 21.03.2020 03:06 damianfrasieanu5387
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/m^3 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 needed to lift a hot air balloon carrying 500 kg?
Answers: 3
Mathematics, 21.06.2019 13:30
Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35
Answers: 2
Mathematics, 21.06.2019 14:40
3× __ -2=15 7 2× __+1=7 5 7× =22 15 5× __+10=2 8 × __+4=20 6 × =10 3 × __+2=8 6 × __+8=8 9 × __+7=20 6
Answers: 3
Hot air is less dense than cool air, so hot air will rise above cool air. Increasing the air tempera...
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