Mgbasa mpaghara - nsogbu na ngwọta

Bɛyɛ mfe 1. Na 20 oC, ogologo mpempe akwụkwọ ígwè bụ 50 cm na obosara ya bụ 30 cm. Ọ bụrụ na ọnụọgụgụ nke Mgbasawanye ahịrị maka ígwè bụ 10-5 oC-1, chọpụta mgbanwe na mpaghara na mpaghara ikpeazụ na 60 oC.

A maara:

The mbụ okpomọkụ (T1) = 20oC

Okpomọkụ ikpeazụ (T)2) = 60oC

Mgbanwe na okpomọkụ (ΔT) = 60oC - 20oC=40oC

Mpaghara mbụ (A)1) = ogologo x obosara = 50 cm x 30 cm = 1500 cm2

Ọnụọgụ nke mgbasawanye ahịrị maka ígwè (α) = 10-5 oC-1

Ọnụ ọgụgụ nke mgbasawanye mpaghara maka ígwè (β) = 2α = 2 x 10-5 oC-1

A chọrọ: Mgbanwe na mpaghara (ΔA)

Ngwọta:

Mgbanwe na mpaghara (ΔA):

ΔA = β A1 ΔT

ΔA = (2 x 10-5 oC-1)(1500 cm)2(40.)oC)

ΔA = (80) X XUMUM-5)(1500 cm)2)

ΔA = 120,000 x 10-5 cm2

ΔA = 1.2 x 105 X XUMUM-5 cm2

ΔA = 1.2 cm2

Mpaghara ikpeazụ (A2):

A2 =A1 + ΔA

A2 = 1500 sentimita2 + 1.2 cm2

A2 = 1501.2 cm2

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Bɛyɛ mfe 2. Na 30 oC, mpaghara nke mpempe akwụkwọ aluminom bụ 40 cm2 na ọnụọgụ nke mgbasawanye ahịrị bụ 24 x 10-6 /oC. Chọpụta okpomọkụ ikpeazụ ma ọ bụrụ na mpaghara ikpeazụ bụ 40.2 cm2.

A maara:

Okpomọkụ mbụ (T)1) = 30oC

Ọnụọgụ nke mgbasawanye ahịrị (α) = 24 x 10-6 oC-1

Ọnụọgụ nke mgbasawanye mpaghara (β) = 2a = 2 x 24 x 10-6 oC-1 = 48 x ihe 10-6 oC-1

Mpaghara mbụ (A)1) = 40cm2

Mpaghara ikpeazụ (A)2) = 40.2cm2

Mgbanwe na mpaghara (ΔA) = 40.2 cm2 - 40 cm2 = 0.2 sentimita2

A chọrọ: Chọpụta okpomọkụ ikpeazụ (T)2)

Ngwọta:

Usoro mgbanwe na mpaghara (ΔA) :

ΔA = β A1 ΔT

Okpomọkụ ikpeazụ (T)2):

ΔA = β A1 (T2 - A1)

0.2 cm2 = (48 x) 10-6 oC-1)(40 cm)2)(T2 - 30oC)

0.2 = (1920 x) 10-6)(T2 - 30)

0.2 = (1.920 x) 10-3)(T2 - 30)

0.2 = (2 x) 10-3)(T2 - 30)

0.2 / (2 X XUMUM-3) = T2 - 30

0.1 X XUMUM3 = T2 - 30

1 x 102 =T2 - 30

100=T2 - 30

100 + 30 = T2

T2 = 130

Okpomọkụ ikpeazụ = 130oC

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3. radius nke mgbanaka na 20 oC bụ 20 cm. Ọ bụrụ na radius ikpeazụ dị na 100 oC bụ 20.5 cm, chọpụta ọnụọgụgụ nke mgbasawanye mpaghara na ọnụọgụgụ nke mgbasawanye ahịrị…

A maara:

Okpomọkụ mbụ (T)1) = 30oC

Okpomọkụ ikpeazụ (T)2) = 100oC

Mgbanwe na okpomọkụ (ΔT) = 100oC - 30oC=70oC

Mgbada mbụ (r)1) = 20cm

Mgbada ikpeazụ (r)2) = 20.5cm

A chọrọ: Ọnụọgụ nke mgbasawanye mpaghara (β)

Ngwọta:

Mpaghara mbụ (A)1) = π r12 = (3.14)(20 cm)2 = (3.14)(400 cm)2) = 1256cm2

Mpaghara ikpeazụ (A)2) = π r22 = (3.14)(20.5 cm)2 = (3.14)(420.25 cm)2) = 1319.585cm2

Mgbanwe na mpaghara (ΔA) = 1319.585 cm2 - 1256 cm2 = 63.585 sentimita2

Usoro mgbanwe na mpaghara (ΔA) :

ΔA = β A1 ΔT

Ọnụọgụ nke mgbasawanye mpaghara:

ΔA = β A1 ΔT

63.585 cm2 = b (1256 cm2(70.) oC)

63.585 = b (87,920 oC)

β = 63.585 / 87,920 oC

β = 0.00072 /oC

β = 7.2 X XUMUM0-4 /oC

β = 7.2 X XUMUM0-4 oC-1

Ọnụọgụ nke mgbasawanye ahịrị (α):

β = 2 α

α = β / 2

α = (7.2) X XUMUM0-4) /2

α = 3.6 X XUMUM0-4 oC-1

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  1. Ịgbanwe nha okpomọkụ
  2. Mgbasawanye ahịrị
  3. Mgbasawanye mpaghara
  4. Mgbasawanye olu
  5. okpomọkụ
  6. Ihe nhata igwe nke okpomọkụ
  7. Ike okpomọkụ na okpomọkụ kpọmkwem
  8. Okpomọkụ zoro ezo, okpomọkụ nke njikọta, okpomọkụ nke vaporization
  9. Nchekwa ike maka nnyefe okpomọkụ

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