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Varvara68 [4.7K]
3 years ago
15

How many calories are equal to one BTU? (One calorie = 4.186 J, one BTU = 1 054 J.)

Physics
2 answers:
natima [27]3 years ago
5 0

Answer:

Explanation:

Given

1 calorie is equals to 4.186 J

and 1 BTU equals to 1054 J

using unitary method

1\ calorie \equiv 4.186 J

1\ calorie \equiv 4.186 \times 1 J

and 1\ J \equiv \frac{1}{1054} BTU

thus   1\ calorie \equiv 4.186 \times \frac{1}{1054} BTU

1\ calorie\ \equiv 0.00397 BTU

1\ calorie\ \equiv 397\time 10^{-5} BTU  

or BTU=251.88\approx 252 cal                      

expeople1 [14]3 years ago
4 0

Answer:

option (c)

Explanation:

According to the question

1 BTU = 1054 J

4.186 J = 1 cal

So, 1 J = 1/4.186 cal

So, 1054 J = 1054 / 4.186 cal

                 = 251.8 cal

By rounding off, it is 252 cal

So, 1 BTU = 252 cal

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