Esercizi Microbiologia generale

• m

d = V

3 3 3

kg/m kg/dm g/cm

• F S F

P = S 2

5

10 = 1, 013

• d · ·

P = d g h 2

g 9, 81m/s

• § · ·

= d V g

a liquido Solido immerso 3

d = 13.590 Kg/m

2Atm · ·

P = d g h

P

h = ·

g d

5 5

· · ·

2Atm = 2 1, 013 10 P a = 2, 026 10 P a

5

·

2, 026 10

h = = 1, 52 m

·

9, 81 13.590 h h

· ·

P = P = d g h

Stevino

applicata

· ·

P = 1000 9, 81 130 = 1.275.300P a = 12, 6Atm

applicata 2

75cm 3

d = 1030 Kg/m

F

F ·

P = F = P S

S · · ·

F = d g h S

2 2 2 2

m 75cm = 0, 75dm = 0, 0075m

· · ·

F = 1030 9, 81 4, 5 0, 0075 = 341N

2

2800N/cm 3 3

·

d = 2, 5 10 Kg/m

h

· ·

P = d g h P = P

f ango f ango f ango petrolio P petrolio

h =

f ango ·

d g

f ango 2

P N/m

petrolio 2 4 2

·

1cm = 1 10 m

2800 7

·

P = = 2, 8 10

petrolio ·

1 10 4

7

·

2, 8 10

h = = 1141, 7m

3

· ·

2, 5 10 9, 81 3

C m = 1000Kg S = 3dm

2

3

d = 800Kg/m P

3

S = 25cm

1

h = 3m P

P + P = P

peso pistone Colonna liquido P eso cilindro

P F

peso pistone P

x = P peso pistone

· · · ·

P = d g h = 800 9, 81 3 = 23.544P a

liquido ·

F 1000 9, 81

P

P = = = 327.000P a

cil S 0, 03

2 2

3dm

)

x + 23.544 = 327.000 x = 327.000 23.544 = 303.456P a

2 2 ·

S = 25cm = 0, 0025m F = P S

1 F =) 758, 64N

pistone

77

m = 1200Kg

a

2

S = 5m

a

2

S = 3, 5dm

P F

S · ·

F S = F S

pistone auto auto pistone

·

F S

auto pistone

F =

pistone S auto 2

·

F = m g = 11.772N m S =

auto auto pistone

2

0, 035m ·

11.772 0, 035

F = = 82, 404N

pistone 5 m = 8, 4Kg

m = 4Kg 3

d = 765Kg/m

· ·

S = d V 9, 81

a olio f usto

3 3

1 1dm V = 0, 005m

f usto

· ·

S = 765 0, 005 9, 81 = 37, 52N

a

⌧ ·

⌧ = F S = 4 9, 81 37, 52 = 1, 72N

p a

500N 460N

)

F = F S S = F F = 40N

acqua aria a a aria acqua

· ·

S = d V 9, 81

a immerso

liquido S a 3 3

V = = 0, 004m = 4dm

corpo ·

d 9, 81

liq