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snow_lady [41]
3 years ago
5

The dimensions of a rectangular prism are shown below:

Mathematics
1 answer:
quester [9]3 years ago
4 0

Answer:

84 cubes

28/9 ft³

Step-by-step explanation:

<u>Dimensions:</u>

  • L = 1 1/3 ft = 4/3 ft
  • W = 1 ft
  • H = 2 1/3 ft = 7/3 ft
  • Small cube has side of 1/3
<h3>Part A</h3>

<u>Volume formula: V= lwh</u>

  • V = 4/3*1*7/3 = 28/9 ft³

<u>Small cube has volume of:</u>

  • (1/3)³ = 1/27 ft³

<u>Number of small cubes:</u>

  • 28/9 ÷ 1/27 = 28/9×27 = 28×3 = 84
<h3>Part B</h3>
  • 28/9 ft³ unit cube
  • 84 unit³ of 1/3 ft
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t₁ = 2 * 2,8278           t₁  = 5,6556 seg

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x = Vox * t₁                        ( Vox es constante   Vx = Vo*cos 60⁰ )

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x₁  =  90,49 m

Aplicando los mismos criterios ahora para el segundo bote

Ahora Vo = 32 -  32*(1/4)

V = 24 m/s

g*t  =  24 * sen 50⁰

t =  24* 0,7660/ 9,8  

t =  1,8759

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t₂  = 3,7518 seg

x₂  =  Vox * t₂

x₂  =  24* 0,6428*3,7518

x₂  =  57,88 m

Y para el tercer bote Vo =  24 - 24(1/4)        Vo = 18 m/s     α = 40⁰

t = 18 *0,6428/9,8

t  = 1,18

2t  = t₃  = 2*1,18

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x₃  = Vox * 2,36                Vox = Vo*cos 40      Vox = 18*0,7660  

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d = x₁  + x₂ + x₃

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d = 180,91 m

y el tiempo total será la suma de los tiempos

t =  t₁  +  t₂  +  t₃

t  = 5,65 + 3,75 + 2,36

t = 11,76 seg

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