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Natasha2012 [34]
3 years ago
9

How far will you travel if you run for 10 minutes at 2 m/s? SHOW WORK PLZS

Physics
1 answer:
ella [17]3 years ago
7 0
10 minutes are the same as 600 seconds.

If you run 2 meters in 1 second then you run 2 * 600 meters in 600 seconds.
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What is the minimal mass of helium (density 0.18 kg/m3) needed to lift a balloon carrying two people in a basket, if the total m
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Answer:   
 M[min] = M[basket+people+ balloon, not gas] * ΔR/R[b] 
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 R[b] is the density of gas inside the baloon.   
 ==================================== 
 Let V be the volume of helium required. 
 Upthrust on helium = Weight of the volume of air displaced = Density of air * g * Volume of helium = 1.225 * g * V   
 U = 1.225gV newtons 
 ---- 
 Weight of Helium = Volume of Helium * Density of Helium * g 
 W[h] = 0.18gV N   
 Net Upward force produced by helium, F = Upthrust - Weight = (1.225-0.18) gV = 1.045gV N  -----

 
 Weight of 260kg = 2549.7 N 
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 =====   
 Let the density of the surroundings be R 
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 M[min] = Weight of basket * (difference in density between balloon's gas and surroundings / density of gas in balloon)   
 M[min] = M[basket] * ΔR/R[b]
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Is the matching correct?
iragen [17]

Yes thats right :)

have a great day!!!


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