Tarea 3

1 )   R=0.486 Ton               Pe=270g/cm³                    

                                         V=0.18m³

 

.18 m³   1000000 cm³= 180,000cm³            p=PeV   180,000 cm³ (2.70g)= 486,000 g

              1 cm³

 

486 Kg   1 Ton     = 0.486 Ton

            1000Kg

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2)  P=   Sgh

a)   (1025kg/m³)(20m)(9.8m/s²)   R= 200,900 pascal

b)   20+3810=3830m (1000kg/m³)(3830m)(9.8m/s²) R= 37534,000 pascal

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3)  P=F

          A     

a)       6 kfg     9.8N = 58.8N         2cm²       1    m²      =0.0002m²                        58.8N=    294,000 pascal

                      1kfg                                   10000cm²                                          0.0002m²

 

b)      90kfg     9.8N =882N            30cm²    1   m²  =   0.003m²                          882N=        294,000 pascal 

                     1kfg                                     10000cm²                                       0.003m²

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4)            F1   =  F2                                                                        F1   =   F2

                 A1      A2                                                                        ∏²       ∏²  

 

950N          =        4(950N)                               1p         =      4

∏(5cm)²                  ∏r²                                   (5cm)²            r²

 

r²    =   4(5cm)²

r²    =   4(25cm²)

√r² =    √100cm²

r     =   √100cm²

r²   =    10cm

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5)  

a)   Variable    32ºC - 10ºC = 22º C

b) K = ºC+273          T1=  10+273= 283 K           T2=  32+273= 305 K           Variable= 305-283= 22 K

c) ºF=9/5(ºC)+32     T1= 1.8(10)+32=50 ºF            T2=1.8(32)+32=89.6 ºF         Variable= 89.6ºF-50ºF=39.6 ºF