Piv txwv ntawm cov lus nug txog kev hloov pauv qhov kub thiab txias

5 Piv txwv ntawm Cov Teeb Meem Hloov Chaw Kub

1. Qhov kub ntawm ib yam khoom yog 122 ° F, thaum ntsuas ntawm Celsius scale, yog ...

A. 323°C

B. 122°C

C. 50°C

Kub: 40°C

Kev Sib Tham

Cov mis hloov pauv kub los ntawm Fahrenheit mus rau Celsius:

T_C = 5/9 (T_F - 32)

Kev piav qhia: T_C = kub hauv Celsius nplai, T_F = qhov kub thiab txias hauv Fahrenheit nplai

Qhov kub hauv Celsius nplai yog:

T_C = 5/9 (122 – 32) = T_C = 5/9 (90) = 5 (10)

T_C = 50 ^oC

Cov lus teb yog C.

2. Ib tug me nyuam muaj kub taub hau, thaum ntsuas nrog lub ntsuas kub uas muaj ob lub nplai, tus lej qhia ntawm Celsius nplai yog 40 °, ces tus lej qhia ntawm Reamur nplai yog ...

A. 31 °R

B. 32 °R

C. 45 °R

D. 50°R

Kev Sib Tham

Nws paub tias:

Kub hauv Celsius nplai (T ^oC) = 40

Nug: Kub ntawm Reamur nplai (T ^oR)

Lus teb:

Qhov kub ntawm cov dej ntshiab (H)₂O) = 100 ^oC = 80 ^oR

Qhov kub ntawm qhov khov ntawm dej ntshiab (H)₂O) = 0 ^oC = 0 ^oR

Hloov ua lwm yam Celsius rau Reamur nplai:

T ^oR = (80/100) T ^oC

T ^oR = (4/5) T ^oC

T ^oR = (4/5) 40

T ^oR = (4)(8)

T ^oR = 32 hli ^oR

Cov lus teb yog B.

3. Saib daim duab ntawm lub ntsuas kub nyob rau sab! Qhov kub Y ntawm lub ntsuas kub Celsius yog...

A. 172 ^oC
B. 108 ^oC
C. 60 ^oC
D. 44 ^oC

Kev Sib Tham

Nws paub tias:
Fahrenheit nplai = 140 ^oF
Xav tau rau: Celsius scale
Lus teb:

Cov mis rau kev hloov Fahrenheit nplai mus rau Celsius nplai:
T ^oC = 5/9 (T) ^oF – 32)
Celsius nplai:
T ^oC = 5/9 (140 – 32)
T ^oC = 5/9 (108)
T ^oC = 540/9
T ^oC = 60
Cov lus teb yog C.

4.

Ua tib zoo saib cov ntsuas kub hauv qab no! Tus nqi Y ntawm lub ntsuas kub Fahrenheit yog…

A. 54 ^oF
B. 65 ^oF
C. 76 ^oF
D. 86 ^oF

Kev Sib Tham
Nws paub tias:
Celsius nplai = 30 ^oC
Xav paub ntxiv: Fahrenheit nplai
Lus teb:
Cov mis rau kev hloov Celsius nplai rau Fahrenheit nplai:
T ^oF = (9/5)(T) ^oC) + 32
Fahrenheit nplai:
T ^oF = (9/5)(30) + 32
T ^oF = (270/5) + 32
T ^oF = 54 + 32
T ^oF = 86
Cov lus teb yog D.

5. Saib daim duab ntsuas kub hauv qab no! Lub ntsuas kub Fahrenheit qhia qhov kub….
A. 92 ^oF
B. 108 ^oF
C. 122 ^oF
D. 140 ^oF
Kev Sib Tham
Nws paub tias:
Celsius nplai = 60 ^oC
Xav paub ntxiv: Fahrenheit nplai
Lus teb:
Cov mis rau kev hloov Celsius nplai rau Fahrenheit nplai:
T ^oF = (9/5)(T) ^oC) + 32
Fahrenheit nplai:
T ^oF = (9/5)(60) + 32
T ^oF = (9)(12) + 32
T ^oF = 108 + 32
T ^oF = 140
Cov lus teb yog D.

Qhov chaw nug lus:

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